drivers/target/target_core_configfs.c

   1 /*******************************************************************************
   2  * Filename:  target_core_configfs.c
   3  *
   4  * This file contains ConfigFS logic for the Generic Target Engine project.
   5  *
   6  * (c) Copyright 2008-2013 Datera, Inc.
   7  *
   8  * Nicholas A. Bellinger <nab@kernel.org>
   9  *
  10  * based on configfs Copyright (C) 2005 Oracle.  All rights reserved.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  ****************************************************************************/
  22
  23 #include <linux/module.h>
  24 #include <linux/moduleparam.h>
  25 #include <generated/utsrelease.h>
  26 #include <linux/utsname.h>
  27 #include <linux/init.h>
  28 #include <linux/fs.h>
  29 #include <linux/namei.h>
  30 #include <linux/slab.h>
  31 #include <linux/types.h>
  32 #include <linux/delay.h>
  33 #include <linux/unistd.h>
  34 #include <linux/string.h>
  35 #include <linux/parser.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/configfs.h>
  38 #include <linux/spinlock.h>
  39
  40 #include <target/target_core_base.h>
  41 #include <target/target_core_backend.h>
  42 #include <target/target_core_fabric.h>
  43
  44 #include "target_core_internal.h"
  45 #include "target_core_alua.h"
  46 #include "target_core_pr.h"
  47 #include "target_core_rd.h"
  48 #include "target_core_xcopy.h"
  49
  50 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs)              \
  51 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  52 {                                                                       \
  53         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  54                                                                         \
  55         cit->ct_item_ops = _item_ops;                                   \
  56         cit->ct_group_ops = _group_ops;                                 \
  57         cit->ct_attrs = _attrs;                                         \
  58         cit->ct_owner = tb->ops->owner;                                 \
  59         pr_debug("Setup generic %s\n", __stringify(_name));             \
  60 }
  61
  62 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops)                  \
  63 static void target_core_setup_##_name##_cit(struct target_backend *tb)  \
  64 {                                                                       \
  65         struct config_item_type *cit = &tb->tb_##_name##_cit;           \
  66                                                                         \
  67         cit->ct_item_ops = _item_ops;                                   \
  68         cit->ct_group_ops = _group_ops;                                 \
  69         cit->ct_attrs = tb->ops->tb_##_name##_attrs;                    \
  70         cit->ct_owner = tb->ops->owner;                                 \
  71         pr_debug("Setup generic %s\n", __stringify(_name));             \
  72 }
  73
  74 extern struct t10_alua_lu_gp *default_lu_gp;
  75
  76 static LIST_HEAD(g_tf_list);
  77 static DEFINE_MUTEX(g_tf_lock);
  78
  79 static struct config_group target_core_hbagroup;
  80 static struct config_group alua_group;
  81 static struct config_group alua_lu_gps_group;
  82
  83 static inline struct se_hba *
  84 item_to_hba(struct config_item *item)
  85 {
  86         return container_of(to_config_group(item), struct se_hba, hba_group);
  87 }
  88
  89 /*
  90  * Attributes for /sys/kernel/config/target/
  91  */
  92 static ssize_t target_core_item_version_show(struct config_item *item,
  93                 char *page)
  94 {
  95         return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
  96                 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
  97                 utsname()->sysname, utsname()->machine);
  98 }
  99
 100 CONFIGFS_ATTR_RO(target_core_item_, version);
 101
 102 static struct target_fabric_configfs *target_core_get_fabric(
 103         const char *name)
 104 {
 105         struct target_fabric_configfs *tf;
 106
 107         if (!name)
 108                 return NULL;
 109
 110         mutex_lock(&g_tf_lock);
 111         list_for_each_entry(tf, &g_tf_list, tf_list) {
 112                 if (!strcmp(tf->tf_ops->name, name)) {
 113                         atomic_inc(&tf->tf_access_cnt);
 114                         mutex_unlock(&g_tf_lock);
 115                         return tf;
 116                 }
 117         }
 118         mutex_unlock(&g_tf_lock);
 119
 120         return NULL;
 121 }
 122
 123 /*
 124  * Called from struct target_core_group_ops->make_group()
 125  */
 126 static struct config_group *target_core_register_fabric(
 127         struct config_group *group,
 128         const char *name)
 129 {
 130         struct target_fabric_configfs *tf;
 131         int ret;
 132
 133         pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
 134                         " %s\n", group, name);
 135
 136         tf = target_core_get_fabric(name);
 137         if (!tf) {
 138                 pr_debug("target_core_register_fabric() trying autoload for %s\n",
 139                          name);
 140
 141                 /*
 142                  * Below are some hardcoded request_module() calls to automatically
 143                  * local fabric modules when the following is called:
 144                  *
 145                  * mkdir -p /sys/kernel/config/target/$MODULE_NAME
 146                  *
 147                  * Note that this does not limit which TCM fabric module can be
 148                  * registered, but simply provids auto loading logic for modules with
 149                  * mkdir(2) system calls with known TCM fabric modules.
 150                  */
 151
 152                 if (!strncmp(name, "iscsi", 5)) {
 153                         /*
 154                          * Automatically load the LIO Target fabric module when the
 155                          * following is called:
 156                          *
 157                          * mkdir -p $CONFIGFS/target/iscsi
 158                          */
 159                         ret = request_module("iscsi_target_mod");
 160                         if (ret < 0) {
 161                                 pr_debug("request_module() failed for"
 162                                          " iscsi_target_mod.ko: %d\n", ret);
 163                                 return ERR_PTR(-EINVAL);
 164                         }
 165                 } else if (!strncmp(name, "loopback", 8)) {
 166                         /*
 167                          * Automatically load the tcm_loop fabric module when the
 168                          * following is called:
 169                          *
 170                          * mkdir -p $CONFIGFS/target/loopback
 171                          */
 172                         ret = request_module("tcm_loop");
 173                         if (ret < 0) {
 174                                 pr_debug("request_module() failed for"
 175                                          " tcm_loop.ko: %d\n", ret);
 176                                 return ERR_PTR(-EINVAL);
 177                         }
 178                 }
 179
 180                 tf = target_core_get_fabric(name);
 181         }
 182
 183         if (!tf) {
 184                 pr_debug("target_core_get_fabric() failed for %s\n",
 185                          name);
 186                 return ERR_PTR(-EINVAL);
 187         }
 188         pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
 189                         " %s\n", tf->tf_ops->name);
 190         /*
 191          * On a successful target_core_get_fabric() look, the returned
 192          * struct target_fabric_configfs *tf will contain a usage reference.
 193          */
 194         pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
 195                         &tf->tf_wwn_cit);
 196
 197         tf->tf_group.default_groups = tf->tf_default_groups;
 198         tf->tf_group.default_groups[0] = &tf->tf_disc_group;
 199         tf->tf_group.default_groups[1] = NULL;
 200
 201         config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
 202         config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
 203                         &tf->tf_discovery_cit);
 204
 205         pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
 206                         " %s\n", tf->tf_group.cg_item.ci_name);
 207         return &tf->tf_group;
 208 }
 209
 210 /*
 211  * Called from struct target_core_group_ops->drop_item()
 212  */
 213 static void target_core_deregister_fabric(
 214         struct config_group *group,
 215         struct config_item *item)
 216 {
 217         struct target_fabric_configfs *tf = container_of(
 218                 to_config_group(item), struct target_fabric_configfs, tf_group);
 219         struct config_group *tf_group;
 220         struct config_item *df_item;
 221         int i;
 222
 223         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
 224                 " tf list\n", config_item_name(item));
 225
 226         pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
 227                         " %s\n", tf->tf_ops->name);
 228         atomic_dec(&tf->tf_access_cnt);
 229
 230         pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
 231                         " %s\n", config_item_name(item));
 232
 233         tf_group = &tf->tf_group;
 234         for (i = 0; tf_group->default_groups[i]; i++) {
 235                 df_item = &tf_group->default_groups[i]->cg_item;
 236                 tf_group->default_groups[i] = NULL;
 237                 config_item_put(df_item);
 238         }
 239         config_item_put(item);
 240 }
 241
 242 static struct configfs_group_operations target_core_fabric_group_ops = {
 243         .make_group     = &target_core_register_fabric,
 244         .drop_item      = &target_core_deregister_fabric,
 245 };
 246
 247 /*
 248  * All item attributes appearing in /sys/kernel/target/ appear here.
 249  */
 250 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
 251         &target_core_item_attr_version,
 252         NULL,
 253 };
 254
 255 /*
 256  * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
 257  */
 258 static struct config_item_type target_core_fabrics_item = {
 259         .ct_group_ops   = &target_core_fabric_group_ops,
 260         .ct_attrs       = target_core_fabric_item_attrs,
 261         .ct_owner       = THIS_MODULE,
 262 };
 263
 264 static struct configfs_subsystem target_core_fabrics = {
 265         .su_group = {
 266                 .cg_item = {
 267                         .ci_namebuf = "target",
 268                         .ci_type = &target_core_fabrics_item,
 269                 },
 270         },
 271 };
 272
 273 int target_depend_item(struct config_item *item)
 274 {
 275         return configfs_depend_item(&target_core_fabrics, item);
 276 }
 277 EXPORT_SYMBOL(target_depend_item);
 278
 279 void target_undepend_item(struct config_item *item)
 280 {
 281         return configfs_undepend_item(item);
 282 }
 283 EXPORT_SYMBOL(target_undepend_item);
 284
 285 /*##############################################################################
 286 // Start functions called by external Target Fabrics Modules
 287 //############################################################################*/
 288
 289 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
 290 {
 291         if (!tfo->name) {
 292                 pr_err("Missing tfo->name\n");
 293                 return -EINVAL;
 294         }
 295         if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
 296                 pr_err("Passed name: %s exceeds TARGET_FABRIC"
 297                         "_NAME_SIZE\n", tfo->name);
 298                 return -EINVAL;
 299         }
 300         if (!tfo->get_fabric_name) {
 301                 pr_err("Missing tfo->get_fabric_name()\n");
 302                 return -EINVAL;
 303         }
 304         if (!tfo->tpg_get_wwn) {
 305                 pr_err("Missing tfo->tpg_get_wwn()\n");
 306                 return -EINVAL;
 307         }
 308         if (!tfo->tpg_get_tag) {
 309                 pr_err("Missing tfo->tpg_get_tag()\n");
 310                 return -EINVAL;
 311         }
 312         if (!tfo->tpg_check_demo_mode) {
 313                 pr_err("Missing tfo->tpg_check_demo_mode()\n");
 314                 return -EINVAL;
 315         }
 316         if (!tfo->tpg_check_demo_mode_cache) {
 317                 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
 318                 return -EINVAL;
 319         }
 320         if (!tfo->tpg_check_demo_mode_write_protect) {
 321                 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
 322                 return -EINVAL;
 323         }
 324         if (!tfo->tpg_check_prod_mode_write_protect) {
 325                 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
 326                 return -EINVAL;
 327         }
 328         if (!tfo->tpg_get_inst_index) {
 329                 pr_err("Missing tfo->tpg_get_inst_index()\n");
 330                 return -EINVAL;
 331         }
 332         if (!tfo->release_cmd) {
 333                 pr_err("Missing tfo->release_cmd()\n");
 334                 return -EINVAL;
 335         }
 336         if (!tfo->shutdown_session) {
 337                 pr_err("Missing tfo->shutdown_session()\n");
 338                 return -EINVAL;
 339         }
 340         if (!tfo->close_session) {
 341                 pr_err("Missing tfo->close_session()\n");
 342                 return -EINVAL;
 343         }
 344         if (!tfo->sess_get_index) {
 345                 pr_err("Missing tfo->sess_get_index()\n");
 346                 return -EINVAL;
 347         }
 348         if (!tfo->write_pending) {
 349                 pr_err("Missing tfo->write_pending()\n");
 350                 return -EINVAL;
 351         }
 352         if (!tfo->write_pending_status) {
 353                 pr_err("Missing tfo->write_pending_status()\n");
 354                 return -EINVAL;
 355         }
 356         if (!tfo->set_default_node_attributes) {
 357                 pr_err("Missing tfo->set_default_node_attributes()\n");
 358                 return -EINVAL;
 359         }
 360         if (!tfo->get_cmd_state) {
 361                 pr_err("Missing tfo->get_cmd_state()\n");
 362                 return -EINVAL;
 363         }
 364         if (!tfo->queue_data_in) {
 365                 pr_err("Missing tfo->queue_data_in()\n");
 366                 return -EINVAL;
 367         }
 368         if (!tfo->queue_status) {
 369                 pr_err("Missing tfo->queue_status()\n");
 370                 return -EINVAL;
 371         }
 372         if (!tfo->queue_tm_rsp) {
 373                 pr_err("Missing tfo->queue_tm_rsp()\n");
 374                 return -EINVAL;
 375         }
 376         if (!tfo->aborted_task) {
 377                 pr_err("Missing tfo->aborted_task()\n");
 378                 return -EINVAL;
 379         }
 380         /*
 381          * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
 382          * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
 383          * target_core_fabric_configfs.c WWN+TPG group context code.
 384          */
 385         if (!tfo->fabric_make_wwn) {
 386                 pr_err("Missing tfo->fabric_make_wwn()\n");
 387                 return -EINVAL;
 388         }
 389         if (!tfo->fabric_drop_wwn) {
 390                 pr_err("Missing tfo->fabric_drop_wwn()\n");
 391                 return -EINVAL;
 392         }
 393         if (!tfo->fabric_make_tpg) {
 394                 pr_err("Missing tfo->fabric_make_tpg()\n");
 395                 return -EINVAL;
 396         }
 397         if (!tfo->fabric_drop_tpg) {
 398                 pr_err("Missing tfo->fabric_drop_tpg()\n");
 399                 return -EINVAL;
 400         }
 401
 402         return 0;
 403 }
 404
 405 int target_register_template(const struct target_core_fabric_ops *fo)
 406 {
 407         struct target_fabric_configfs *tf;
 408         int ret;
 409
 410         ret = target_fabric_tf_ops_check(fo);
 411         if (ret)
 412                 return ret;
 413
 414         tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
 415         if (!tf) {
 416                 pr_err("%s: could not allocate memory!\n", __func__);
 417                 return -ENOMEM;
 418         }
 419
 420         INIT_LIST_HEAD(&tf->tf_list);
 421         atomic_set(&tf->tf_access_cnt, 0);
 422         tf->tf_ops = fo;
 423         target_fabric_setup_cits(tf);
 424
 425         mutex_lock(&g_tf_lock);
 426         list_add_tail(&tf->tf_list, &g_tf_list);
 427         mutex_unlock(&g_tf_lock);
 428
 429         return 0;
 430 }
 431 EXPORT_SYMBOL(target_register_template);
 432
 433 void target_unregister_template(const struct target_core_fabric_ops *fo)
 434 {
 435         struct target_fabric_configfs *t;
 436
 437         mutex_lock(&g_tf_lock);
 438         list_for_each_entry(t, &g_tf_list, tf_list) {
 439                 if (!strcmp(t->tf_ops->name, fo->name)) {
 440                         BUG_ON(atomic_read(&t->tf_access_cnt));
 441                         list_del(&t->tf_list);
 442                         mutex_unlock(&g_tf_lock);
 443                         /*
 444                          * Wait for any outstanding fabric se_deve_entry->rcu_head
 445                          * callbacks to complete post kfree_rcu(), before allowing
 446                          * fabric driver unload of TFO->module to proceed.
 447                          */
 448                         rcu_barrier();
 449                         kfree(t);
 450                         return;
 451                 }
 452         }
 453         mutex_unlock(&g_tf_lock);
 454 }
 455 EXPORT_SYMBOL(target_unregister_template);
 456
 457 /*##############################################################################
 458 // Stop functions called by external Target Fabrics Modules
 459 //############################################################################*/
 460
 461 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
 462 {
 463         return container_of(to_config_group(item), struct se_dev_attrib,
 464                         da_group);
 465 }
 466
 467 /* Start functions for struct config_item_type tb_dev_attrib_cit */
 468 #define DEF_CONFIGFS_ATTRIB_SHOW(_name)                                 \
 469 static ssize_t _name##_show(struct config_item *item, char *page)       \
 470 {                                                                       \
 471         return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
 472 }
 473
 474 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
 475 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
 476 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
 477 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
 478 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
 479 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
 480 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
 481 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
 482 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
 483 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
 484 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
 485 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
 486 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
 487 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format);
 488 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
 489 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
 490 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
 491 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
 492 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
 493 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
 494 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
 495 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
 496 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
 497 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
 498 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
 499 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
 500 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
 501 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
 502 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
 503 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
 504
 505 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name)                            \
 506 static ssize_t _name##_store(struct config_item *item, const char *page,\
 507                 size_t count)                                           \
 508 {                                                                       \
 509         struct se_dev_attrib *da = to_attrib(item);                     \
 510         u32 val;                                                        \
 511         int ret;                                                        \
 512                                                                         \
 513         ret = kstrtou32(page, 0, &val);                                 \
 514         if (ret < 0)                                                    \
 515                 return ret;                                             \
 516         da->_name = val;                                                \
 517         return count;                                                   \
 518 }
 519
 520 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
 521 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
 522 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
 523 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
 524 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
 525
 526 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name)                           \
 527 static ssize_t _name##_store(struct config_item *item, const char *page,        \
 528                 size_t count)                                           \
 529 {                                                                       \
 530         struct se_dev_attrib *da = to_attrib(item);                     \
 531         bool flag;                                                      \
 532         int ret;                                                        \
 533                                                                         \
 534         ret = strtobool(page, &flag);                                   \
 535         if (ret < 0)                                                    \
 536                 return ret;                                             \
 537         da->_name = flag;                                               \
 538         return count;                                                   \
 539 }
 540
 541 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
 542 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
 543 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
 544 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
 545 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
 546
 547 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name)                           \
 548 static ssize_t _name##_store(struct config_item *item, const char *page,\
 549                 size_t count)                                           \
 550 {                                                                       \
 551         printk_once(KERN_WARNING                                        \
 552                 "ignoring deprecated %s attribute\n",                   \
 553                 __stringify(_name));                                    \
 554         return count;                                                   \
 555 }
 556
 557 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
 558 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
 559
 560 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
 561 {
 562         const char *configname;
 563
 564         configname = config_item_name(&dev->dev_group.cg_item);
 565         if (strlen(configname) >= 16) {
 566                 pr_warn("dev[%p]: Backstore name '%s' is too long for "
 567                         "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
 568                         configname);
 569         }
 570         snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
 571 }
 572
 573 static ssize_t emulate_model_alias_store(struct config_item *item,
 574                 const char *page, size_t count)
 575 {
 576         struct se_dev_attrib *da = to_attrib(item);
 577         struct se_device *dev = da->da_dev;
 578         bool flag;
 579         int ret;
 580
 581         if (dev->export_count) {
 582                 pr_err("dev[%p]: Unable to change model alias"
 583                         " while export_count is %d\n",
 584                         dev, dev->export_count);
 585                 return -EINVAL;
 586         }
 587
 588         ret = strtobool(page, &flag);
 589         if (ret < 0)
 590                 return ret;
 591
 592         if (flag) {
 593                 dev_set_t10_wwn_model_alias(dev);
 594         } else {
 595                 strncpy(&dev->t10_wwn.model[0],
 596                         dev->transport->inquiry_prod, 16);
 597         }
 598         da->emulate_model_alias = flag;
 599         return count;
 600 }
 601
 602 static ssize_t emulate_write_cache_store(struct config_item *item,
 603                 const char *page, size_t count)
 604 {
 605         struct se_dev_attrib *da = to_attrib(item);
 606         bool flag;
 607         int ret;
 608
 609         ret = strtobool(page, &flag);
 610         if (ret < 0)
 611                 return ret;
 612
 613         if (flag && da->da_dev->transport->get_write_cache) {
 614                 pr_err("emulate_write_cache not supported for this device\n");
 615                 return -EINVAL;
 616         }
 617
 618         da->emulate_write_cache = flag;
 619         pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
 620                         da->da_dev, flag);
 621         return count;
 622 }
 623
 624 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
 625                 const char *page, size_t count)
 626 {
 627         struct se_dev_attrib *da = to_attrib(item);
 628         u32 val;
 629         int ret;
 630
 631         ret = kstrtou32(page, 0, &val);
 632         if (ret < 0)
 633                 return ret;
 634
 635         if (val != 0 && val != 1 && val != 2) {
 636                 pr_err("Illegal value %d\n", val);
 637                 return -EINVAL;
 638         }
 639
 640         if (da->da_dev->export_count) {
 641                 pr_err("dev[%p]: Unable to change SE Device"
 642                         " UA_INTRLCK_CTRL while export_count is %d\n",
 643                         da->da_dev, da->da_dev->export_count);
 644                 return -EINVAL;
 645         }
 646         da->emulate_ua_intlck_ctrl = val;
 647         pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
 648                 da->da_dev, val);
 649         return count;
 650 }
 651
 652 static ssize_t emulate_tas_store(struct config_item *item,
 653                 const char *page, size_t count)
 654 {
 655         struct se_dev_attrib *da = to_attrib(item);
 656         bool flag;
 657         int ret;
 658
 659         ret = strtobool(page, &flag);
 660         if (ret < 0)
 661                 return ret;
 662
 663         if (da->da_dev->export_count) {
 664                 pr_err("dev[%p]: Unable to change SE Device TAS while"
 665                         " export_count is %d\n",
 666                         da->da_dev, da->da_dev->export_count);
 667                 return -EINVAL;
 668         }
 669         da->emulate_tas = flag;
 670         pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
 671                 da->da_dev, flag ? "Enabled" : "Disabled");
 672
 673         return count;
 674 }
 675
 676 static ssize_t emulate_tpu_store(struct config_item *item,
 677                 const char *page, size_t count)
 678 {
 679         struct se_dev_attrib *da = to_attrib(item);
 680         bool flag;
 681         int ret;
 682
 683         ret = strtobool(page, &flag);
 684         if (ret < 0)
 685                 return ret;
 686
 687         /*
 688          * We expect this value to be non-zero when generic Block Layer
 689          * Discard supported is detected iblock_create_virtdevice().
 690          */
 691         if (flag && !da->max_unmap_block_desc_count) {
 692                 pr_err("Generic Block Discard not supported\n");
 693                 return -ENOSYS;
 694         }
 695
 696         da->emulate_tpu = flag;
 697         pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
 698                 da->da_dev, flag);
 699         return count;
 700 }
 701
 702 static ssize_t emulate_tpws_store(struct config_item *item,
 703                 const char *page, size_t count)
 704 {
 705         struct se_dev_attrib *da = to_attrib(item);
 706         bool flag;
 707         int ret;
 708
 709         ret = strtobool(page, &flag);
 710         if (ret < 0)
 711                 return ret;
 712
 713         /*
 714          * We expect this value to be non-zero when generic Block Layer
 715          * Discard supported is detected iblock_create_virtdevice().
 716          */
 717         if (flag && !da->max_unmap_block_desc_count) {
 718                 pr_err("Generic Block Discard not supported\n");
 719                 return -ENOSYS;
 720         }
 721
 722         da->emulate_tpws = flag;
 723         pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
 724                                 da->da_dev, flag);
 725         return count;
 726 }
 727
 728 static ssize_t pi_prot_type_store(struct config_item *item,
 729                 const char *page, size_t count)
 730 {
 731         struct se_dev_attrib *da = to_attrib(item);
 732         int old_prot = da->pi_prot_type, ret;
 733         struct se_device *dev = da->da_dev;
 734         u32 flag;
 735
 736         ret = kstrtou32(page, 0, &flag);
 737         if (ret < 0)
 738                 return ret;
 739
 740         if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
 741                 pr_err("Illegal value %d for pi_prot_type\n", flag);
 742                 return -EINVAL;
 743         }
 744         if (flag == 2) {
 745                 pr_err("DIF TYPE2 protection currently not supported\n");
 746                 return -ENOSYS;
 747         }
 748         if (da->hw_pi_prot_type) {
 749                 pr_warn("DIF protection enabled on underlying hardware,"
 750                         " ignoring\n");
 751                 return count;
 752         }
 753         if (!dev->transport->init_prot || !dev->transport->free_prot) {
 754                 /* 0 is only allowed value for non-supporting backends */
 755                 if (flag == 0)
 756                         return count;
 757
 758                 pr_err("DIF protection not supported by backend: %s\n",
 759                        dev->transport->name);
 760                 return -ENOSYS;
 761         }
 762         if (!(dev->dev_flags & DF_CONFIGURED)) {
 763                 pr_err("DIF protection requires device to be configured\n");
 764                 return -ENODEV;
 765         }
 766         if (dev->export_count) {
 767                 pr_err("dev[%p]: Unable to change SE Device PROT type while"
 768                        " export_count is %d\n", dev, dev->export_count);
 769                 return -EINVAL;
 770         }
 771
 772         da->pi_prot_type = flag;
 773
 774         if (flag && !old_prot) {
 775                 ret = dev->transport->init_prot(dev);
 776                 if (ret) {
 777                         da->pi_prot_type = old_prot;
 778                         return ret;
 779                 }
 780
 781         } else if (!flag && old_prot) {
 782                 dev->transport->free_prot(dev);
 783         }
 784
 785         pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
 786         return count;
 787 }
 788
 789 static ssize_t pi_prot_format_store(struct config_item *item,
 790                 const char *page, size_t count)
 791 {
 792         struct se_dev_attrib *da = to_attrib(item);
 793         struct se_device *dev = da->da_dev;
 794         bool flag;
 795         int ret;
 796
 797         ret = strtobool(page, &flag);
 798         if (ret < 0)
 799                 return ret;
 800
 801         if (!flag)
 802                 return count;
 803
 804         if (!dev->transport->format_prot) {
 805                 pr_err("DIF protection format not supported by backend %s\n",
 806                        dev->transport->name);
 807                 return -ENOSYS;
 808         }
 809         if (!(dev->dev_flags & DF_CONFIGURED)) {
 810                 pr_err("DIF protection format requires device to be configured\n");
 811                 return -ENODEV;
 812         }
 813         if (dev->export_count) {
 814                 pr_err("dev[%p]: Unable to format SE Device PROT type while"
 815                        " export_count is %d\n", dev, dev->export_count);
 816                 return -EINVAL;
 817         }
 818
 819         ret = dev->transport->format_prot(dev);
 820         if (ret)
 821                 return ret;
 822
 823         pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
 824         return count;
 825 }
 826
 827 static ssize_t force_pr_aptpl_store(struct config_item *item,
 828                 const char *page, size_t count)
 829 {
 830         struct se_dev_attrib *da = to_attrib(item);
 831         bool flag;
 832         int ret;
 833
 834         ret = strtobool(page, &flag);
 835         if (ret < 0)
 836                 return ret;
 837         if (da->da_dev->export_count) {
 838                 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
 839                        " export_count is %d\n",
 840                        da->da_dev, da->da_dev->export_count);
 841                 return -EINVAL;
 842         }
 843
 844         da->force_pr_aptpl = flag;
 845         pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
 846         return count;
 847 }
 848
 849 static ssize_t emulate_rest_reord_store(struct config_item *item,
 850                 const char *page, size_t count)
 851 {
 852         struct se_dev_attrib *da = to_attrib(item);
 853         bool flag;
 854         int ret;
 855
 856         ret = strtobool(page, &flag);
 857         if (ret < 0)
 858                 return ret;
 859
 860         if (flag != 0) {
 861                 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
 862                         " reordering not implemented\n", da->da_dev);
 863                 return -ENOSYS;
 864         }
 865         da->emulate_rest_reord = flag;
 866         pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
 867                 da->da_dev, flag);
 868         return count;
 869 }
 870
 871 static ssize_t unmap_zeroes_data_store(struct config_item *item,
 872                 const char *page, size_t count)
 873 {
 874         struct se_dev_attrib *da = to_attrib(item);
 875         bool flag;
 876         int ret;
 877
 878         ret = strtobool(page, &flag);
 879         if (ret < 0)
 880                 return ret;
 881
 882         if (da->da_dev->export_count) {
 883                 pr_err("dev[%p]: Unable to change SE Device"
 884                        " unmap_zeroes_data while export_count is %d\n",
 885                        da->da_dev, da->da_dev->export_count);
 886                 return -EINVAL;
 887         }
 888         /*
 889          * We expect this value to be non-zero when generic Block Layer
 890          * Discard supported is detected iblock_configure_device().
 891          */
 892         if (flag && !da->max_unmap_block_desc_count) {
 893                 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
 894                        " because max_unmap_block_desc_count is zero\n",
 895                        da->da_dev);
 896                 return -ENOSYS;
 897         }
 898         da->unmap_zeroes_data = flag;
 899         pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
 900                  da->da_dev, flag);
 901         return 0;
 902 }
 903
 904 /*
 905  * Note, this can only be called on unexported SE Device Object.
 906  */
 907 static ssize_t queue_depth_store(struct config_item *item,
 908                 const char *page, size_t count)
 909 {
 910         struct se_dev_attrib *da = to_attrib(item);
 911         struct se_device *dev = da->da_dev;
 912         u32 val;
 913         int ret;
 914
 915         ret = kstrtou32(page, 0, &val);
 916         if (ret < 0)
 917                 return ret;
 918
 919         if (dev->export_count) {
 920                 pr_err("dev[%p]: Unable to change SE Device TCQ while"
 921                         " export_count is %d\n",
 922                         dev, dev->export_count);
 923                 return -EINVAL;
 924         }
 925         if (!val) {
 926                 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
 927                 return -EINVAL;
 928         }
 929
 930         if (val > dev->dev_attrib.queue_depth) {
 931                 if (val > dev->dev_attrib.hw_queue_depth) {
 932                         pr_err("dev[%p]: Passed queue_depth:"
 933                                 " %u exceeds TCM/SE_Device MAX"
 934                                 " TCQ: %u\n", dev, val,
 935                                 dev->dev_attrib.hw_queue_depth);
 936                         return -EINVAL;
 937                 }
 938         }
 939         da->queue_depth = dev->queue_depth = val;
 940         pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
 941         return count;
 942 }
 943
 944 static ssize_t optimal_sectors_store(struct config_item *item,
 945                 const char *page, size_t count)
 946 {
 947         struct se_dev_attrib *da = to_attrib(item);
 948         u32 val;
 949         int ret;
 950
 951         ret = kstrtou32(page, 0, &val);
 952         if (ret < 0)
 953                 return ret;
 954
 955         if (da->da_dev->export_count) {
 956                 pr_err("dev[%p]: Unable to change SE Device"
 957                         " optimal_sectors while export_count is %d\n",
 958                         da->da_dev, da->da_dev->export_count);
 959                 return -EINVAL;
 960         }
 961         if (val > da->hw_max_sectors) {
 962                 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
 963                         " greater than hw_max_sectors: %u\n",
 964                         da->da_dev, val, da->hw_max_sectors);
 965                 return -EINVAL;
 966         }
 967
 968         da->optimal_sectors = val;
 969         pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
 970                         da->da_dev, val);
 971         return count;
 972 }
 973
 974 static ssize_t block_size_store(struct config_item *item,
 975                 const char *page, size_t count)
 976 {
 977         struct se_dev_attrib *da = to_attrib(item);
 978         u32 val;
 979         int ret;
 980
 981         ret = kstrtou32(page, 0, &val);
 982         if (ret < 0)
 983                 return ret;
 984
 985         if (da->da_dev->export_count) {
 986                 pr_err("dev[%p]: Unable to change SE Device block_size"
 987                         " while export_count is %d\n",
 988                         da->da_dev, da->da_dev->export_count);
 989                 return -EINVAL;
 990         }
 991
 992         if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
 993                 pr_err("dev[%p]: Illegal value for block_device: %u"
 994                         " for SE device, must be 512, 1024, 2048 or 4096\n",
 995                         da->da_dev, val);
 996                 return -EINVAL;
 997         }
 998
 999         da->block_size = val;
1000         if (da->max_bytes_per_io)
1001                 da->hw_max_sectors = da->max_bytes_per_io / val;
1002
1003         pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1004                         da->da_dev, val);
1005         return count;
1006 }
1007
1008 CONFIGFS_ATTR(, emulate_model_alias);
1009 CONFIGFS_ATTR(, emulate_dpo);
1010 CONFIGFS_ATTR(, emulate_fua_write);
1011 CONFIGFS_ATTR(, emulate_fua_read);
1012 CONFIGFS_ATTR(, emulate_write_cache);
1013 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1014 CONFIGFS_ATTR(, emulate_tas);
1015 CONFIGFS_ATTR(, emulate_tpu);
1016 CONFIGFS_ATTR(, emulate_tpws);
1017 CONFIGFS_ATTR(, emulate_caw);
1018 CONFIGFS_ATTR(, emulate_3pc);
1019 CONFIGFS_ATTR(, pi_prot_type);
1020 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1021 CONFIGFS_ATTR(, pi_prot_format);
1022 CONFIGFS_ATTR(, enforce_pr_isids);
1023 CONFIGFS_ATTR(, is_nonrot);
1024 CONFIGFS_ATTR(, emulate_rest_reord);
1025 CONFIGFS_ATTR(, force_pr_aptpl);
1026 CONFIGFS_ATTR_RO(, hw_block_size);
1027 CONFIGFS_ATTR(, block_size);
1028 CONFIGFS_ATTR_RO(, hw_max_sectors);
1029 CONFIGFS_ATTR(, optimal_sectors);
1030 CONFIGFS_ATTR_RO(, hw_queue_depth);
1031 CONFIGFS_ATTR(, queue_depth);
1032 CONFIGFS_ATTR(, max_unmap_lba_count);
1033 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1034 CONFIGFS_ATTR(, unmap_granularity);
1035 CONFIGFS_ATTR(, unmap_granularity_alignment);
1036 CONFIGFS_ATTR(, unmap_zeroes_data);
1037 CONFIGFS_ATTR(, max_write_same_len);
1038
1039 /*
1040  * dev_attrib attributes for devices using the target core SBC/SPC
1041  * interpreter.  Any backend using spc_parse_cdb should be using
1042  * these.
1043  */
1044 struct configfs_attribute *sbc_attrib_attrs[] = {
1045         &attr_emulate_model_alias,
1046         &attr_emulate_dpo,
1047         &attr_emulate_fua_write,
1048         &attr_emulate_fua_read,
1049         &attr_emulate_write_cache,
1050         &attr_emulate_ua_intlck_ctrl,
1051         &attr_emulate_tas,
1052         &attr_emulate_tpu,
1053         &attr_emulate_tpws,
1054         &attr_emulate_caw,
1055         &attr_emulate_3pc,
1056         &attr_pi_prot_type,
1057         &attr_hw_pi_prot_type,
1058         &attr_pi_prot_format,
1059         &attr_enforce_pr_isids,
1060         &attr_is_nonrot,
1061         &attr_emulate_rest_reord,
1062         &attr_force_pr_aptpl,
1063         &attr_hw_block_size,
1064         &attr_block_size,
1065         &attr_hw_max_sectors,
1066         &attr_optimal_sectors,
1067         &attr_hw_queue_depth,
1068         &attr_queue_depth,
1069         &attr_max_unmap_lba_count,
1070         &attr_max_unmap_block_desc_count,
1071         &attr_unmap_granularity,
1072         &attr_unmap_granularity_alignment,
1073         &attr_unmap_zeroes_data,
1074         &attr_max_write_same_len,
1075         NULL,
1076 };
1077 EXPORT_SYMBOL(sbc_attrib_attrs);
1078
1079 /*
1080  * Minimal dev_attrib attributes for devices passing through CDBs.
1081  * In this case we only provide a few read-only attributes for
1082  * backwards compatibility.
1083  */
1084 struct configfs_attribute *passthrough_attrib_attrs[] = {
1085         &attr_hw_pi_prot_type,
1086         &attr_hw_block_size,
1087         &attr_hw_max_sectors,
1088         &attr_hw_queue_depth,
1089         NULL,
1090 };
1091 EXPORT_SYMBOL(passthrough_attrib_attrs);
1092
1093 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1094
1095 /* End functions for struct config_item_type tb_dev_attrib_cit */
1096
1097 /*  Start functions for struct config_item_type tb_dev_wwn_cit */
1098
1099 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1100 {
1101         return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1102 }
1103
1104 /*
1105  * VPD page 0x80 Unit serial
1106  */
1107 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1108                 char *page)
1109 {
1110         return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1111                 &to_t10_wwn(item)->unit_serial[0]);
1112 }
1113
1114 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1115                 const char *page, size_t count)
1116 {
1117         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1118         struct se_device *dev = t10_wwn->t10_dev;
1119         unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1120
1121         /*
1122          * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1123          * from the struct scsi_device level firmware, do not allow
1124          * VPD Unit Serial to be emulated.
1125          *
1126          * Note this struct scsi_device could also be emulating VPD
1127          * information from its drivers/scsi LLD.  But for now we assume
1128          * it is doing 'the right thing' wrt a world wide unique
1129          * VPD Unit Serial Number that OS dependent multipath can depend on.
1130          */
1131         if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1132                 pr_err("Underlying SCSI device firmware provided VPD"
1133                         " Unit Serial, ignoring request\n");
1134                 return -EOPNOTSUPP;
1135         }
1136
1137         if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1138                 pr_err("Emulated VPD Unit Serial exceeds"
1139                 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1140                 return -EOVERFLOW;
1141         }
1142         /*
1143          * Check to see if any active $FABRIC_MOD exports exist.  If they
1144          * do exist, fail here as changing this information on the fly
1145          * (underneath the initiator side OS dependent multipath code)
1146          * could cause negative effects.
1147          */
1148         if (dev->export_count) {
1149                 pr_err("Unable to set VPD Unit Serial while"
1150                         " active %d $FABRIC_MOD exports exist\n",
1151                         dev->export_count);
1152                 return -EINVAL;
1153         }
1154
1155         /*
1156          * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1157          *
1158          * Also, strip any newline added from the userspace
1159          * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1160          */
1161         memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1162         snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1163         snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1164                         "%s", strstrip(buf));
1165         dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1166
1167         pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1168                         " %s\n", dev->t10_wwn.unit_serial);
1169
1170         return count;
1171 }
1172
1173 /*
1174  * VPD page 0x83 Protocol Identifier
1175  */
1176 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1177                 char *page)
1178 {
1179         struct t10_wwn *t10_wwn = to_t10_wwn(item);
1180         struct t10_vpd *vpd;
1181         unsigned char buf[VPD_TMP_BUF_SIZE];
1182         ssize_t len = 0;
1183
1184         memset(buf, 0, VPD_TMP_BUF_SIZE);
1185
1186         spin_lock(&t10_wwn->t10_vpd_lock);
1187         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1188                 if (!vpd->protocol_identifier_set)
1189                         continue;
1190
1191                 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1192
1193                 if (len + strlen(buf) >= PAGE_SIZE)
1194                         break;
1195
1196                 len += sprintf(page+len, "%s", buf);
1197         }
1198         spin_unlock(&t10_wwn->t10_vpd_lock);
1199
1200         return len;
1201 }
1202
1203 /*
1204  * Generic wrapper for dumping VPD identifiers by association.
1205  */
1206 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc)                           \
1207 static ssize_t target_wwn_##_name##_show(struct config_item *item,      \
1208                 char *page)                                             \
1209 {                                                                       \
1210         struct t10_wwn *t10_wwn = to_t10_wwn(item);                     \
1211         struct t10_vpd *vpd;                                            \
1212         unsigned char buf[VPD_TMP_BUF_SIZE];                            \
1213         ssize_t len = 0;                                                \
1214                                                                         \
1215         spin_lock(&t10_wwn->t10_vpd_lock);                              \
1216         list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {    \
1217                 if (vpd->association != _assoc)                         \
1218                         continue;                                       \
1219                                                                         \
1220                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1221                 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE);   \
1222                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1223                         break;                                          \
1224                 len += sprintf(page+len, "%s", buf);                    \
1225                                                                         \
1226                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1227                 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1228                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1229                         break;                                          \
1230                 len += sprintf(page+len, "%s", buf);                    \
1231                                                                         \
1232                 memset(buf, 0, VPD_TMP_BUF_SIZE);                       \
1233                 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1234                 if (len + strlen(buf) >= PAGE_SIZE)                     \
1235                         break;                                          \
1236                 len += sprintf(page+len, "%s", buf);                    \
1237         }                                                               \
1238         spin_unlock(&t10_wwn->t10_vpd_lock);                            \
1239                                                                         \
1240         return len;                                                     \
1241 }
1242
1243 /* VPD page 0x83 Association: Logical Unit */
1244 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1245 /* VPD page 0x83 Association: Target Port */
1246 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1247 /* VPD page 0x83 Association: SCSI Target Device */
1248 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1249
1250 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1251 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1252 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1253 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1254 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1255
1256 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1257         &target_wwn_attr_vpd_unit_serial,
1258         &target_wwn_attr_vpd_protocol_identifier,
1259         &target_wwn_attr_vpd_assoc_logical_unit,
1260         &target_wwn_attr_vpd_assoc_target_port,
1261         &target_wwn_attr_vpd_assoc_scsi_target_device,
1262         NULL,
1263 };
1264
1265 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1266
1267 /*  End functions for struct config_item_type tb_dev_wwn_cit */
1268
1269 /*  Start functions for struct config_item_type tb_dev_pr_cit */
1270
1271 static struct se_device *pr_to_dev(struct config_item *item)
1272 {
1273         return container_of(to_config_group(item), struct se_device,
1274                         dev_pr_group);
1275 }
1276
1277 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1278                 char *page)
1279 {
1280         struct se_node_acl *se_nacl;
1281         struct t10_pr_registration *pr_reg;
1282         char i_buf[PR_REG_ISID_ID_LEN];
1283
1284         memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1285
1286         pr_reg = dev->dev_pr_res_holder;
1287         if (!pr_reg)
1288                 return sprintf(page, "No SPC-3 Reservation holder\n");
1289
1290         se_nacl = pr_reg->pr_reg_nacl;
1291         core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1292
1293         return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1294                 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1295                 se_nacl->initiatorname, i_buf);
1296 }
1297
1298 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1299                 char *page)
1300 {
1301         struct se_node_acl *se_nacl;
1302         ssize_t len;
1303
1304         se_nacl = dev->dev_reserved_node_acl;
1305         if (se_nacl) {
1306                 len = sprintf(page,
1307                               "SPC-2 Reservation: %s Initiator: %s\n",
1308                               se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1309                               se_nacl->initiatorname);
1310         } else {
1311                 len = sprintf(page, "No SPC-2 Reservation holder\n");
1312         }
1313         return len;
1314 }
1315
1316 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1317 {
1318         struct se_device *dev = pr_to_dev(item);
1319         int ret;
1320
1321         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1322                 return sprintf(page, "Passthrough\n");
1323
1324         spin_lock(&dev->dev_reservation_lock);
1325         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1326                 ret = target_core_dev_pr_show_spc2_res(dev, page);
1327         else
1328                 ret = target_core_dev_pr_show_spc3_res(dev, page);
1329         spin_unlock(&dev->dev_reservation_lock);
1330         return ret;
1331 }
1332
1333 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1334                 char *page)
1335 {
1336         struct se_device *dev = pr_to_dev(item);
1337         ssize_t len = 0;
1338
1339         spin_lock(&dev->dev_reservation_lock);
1340         if (!dev->dev_pr_res_holder) {
1341                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1342         } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1343                 len = sprintf(page, "SPC-3 Reservation: All Target"
1344                         " Ports registration\n");
1345         } else {
1346                 len = sprintf(page, "SPC-3 Reservation: Single"
1347                         " Target Port registration\n");
1348         }
1349
1350         spin_unlock(&dev->dev_reservation_lock);
1351         return len;
1352 }
1353
1354 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1355                 char *page)
1356 {
1357         return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1358 }
1359
1360
1361 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1362                 char *page)
1363 {
1364         struct se_device *dev = pr_to_dev(item);
1365         struct se_node_acl *se_nacl;
1366         struct se_portal_group *se_tpg;
1367         struct t10_pr_registration *pr_reg;
1368         const struct target_core_fabric_ops *tfo;
1369         ssize_t len = 0;
1370
1371         spin_lock(&dev->dev_reservation_lock);
1372         pr_reg = dev->dev_pr_res_holder;
1373         if (!pr_reg) {
1374                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1375                 goto out_unlock;
1376         }
1377
1378         se_nacl = pr_reg->pr_reg_nacl;
1379         se_tpg = se_nacl->se_tpg;
1380         tfo = se_tpg->se_tpg_tfo;
1381
1382         len += sprintf(page+len, "SPC-3 Reservation: %s"
1383                 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1384                 tfo->tpg_get_wwn(se_tpg));
1385         len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1386                 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1387                 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1388                 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1389                 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1390
1391 out_unlock:
1392         spin_unlock(&dev->dev_reservation_lock);
1393         return len;
1394 }
1395
1396
1397 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1398                 char *page)
1399 {
1400         struct se_device *dev = pr_to_dev(item);
1401         const struct target_core_fabric_ops *tfo;
1402         struct t10_pr_registration *pr_reg;
1403         unsigned char buf[384];
1404         char i_buf[PR_REG_ISID_ID_LEN];
1405         ssize_t len = 0;
1406         int reg_count = 0;
1407
1408         len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1409
1410         spin_lock(&dev->t10_pr.registration_lock);
1411         list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1412                         pr_reg_list) {
1413
1414                 memset(buf, 0, 384);
1415                 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1416                 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1417                 core_pr_dump_initiator_port(pr_reg, i_buf,
1418                                         PR_REG_ISID_ID_LEN);
1419                 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1420                         tfo->get_fabric_name(),
1421                         pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1422                         pr_reg->pr_res_generation);
1423
1424                 if (len + strlen(buf) >= PAGE_SIZE)
1425                         break;
1426
1427                 len += sprintf(page+len, "%s", buf);
1428                 reg_count++;
1429         }
1430         spin_unlock(&dev->t10_pr.registration_lock);
1431
1432         if (!reg_count)
1433                 len += sprintf(page+len, "None\n");
1434
1435         return len;
1436 }
1437
1438 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1439 {
1440         struct se_device *dev = pr_to_dev(item);
1441         struct t10_pr_registration *pr_reg;
1442         ssize_t len = 0;
1443
1444         spin_lock(&dev->dev_reservation_lock);
1445         pr_reg = dev->dev_pr_res_holder;
1446         if (pr_reg) {
1447                 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1448                         core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1449         } else {
1450                 len = sprintf(page, "No SPC-3 Reservation holder\n");
1451         }
1452
1453         spin_unlock(&dev->dev_reservation_lock);
1454         return len;
1455 }
1456
1457 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1458 {
1459         struct se_device *dev = pr_to_dev(item);
1460
1461         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1462                 return sprintf(page, "SPC_PASSTHROUGH\n");
1463         else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1464                 return sprintf(page, "SPC2_RESERVATIONS\n");
1465         else
1466                 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1467 }
1468
1469 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1470                 char *page)
1471 {
1472         struct se_device *dev = pr_to_dev(item);
1473
1474         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1475                 return 0;
1476
1477         return sprintf(page, "APTPL Bit Status: %s\n",
1478                 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1479 }
1480
1481 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1482                 char *page)
1483 {
1484         struct se_device *dev = pr_to_dev(item);
1485
1486         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1487                 return 0;
1488
1489         return sprintf(page, "Ready to process PR APTPL metadata..\n");
1490 }
1491
1492 enum {
1493         Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1494         Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1495         Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1496         Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1497 };
1498
1499 static match_table_t tokens = {
1500         {Opt_initiator_fabric, "initiator_fabric=%s"},
1501         {Opt_initiator_node, "initiator_node=%s"},
1502         {Opt_initiator_sid, "initiator_sid=%s"},
1503         {Opt_sa_res_key, "sa_res_key=%s"},
1504         {Opt_res_holder, "res_holder=%d"},
1505         {Opt_res_type, "res_type=%d"},
1506         {Opt_res_scope, "res_scope=%d"},
1507         {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1508         {Opt_mapped_lun, "mapped_lun=%lld"},
1509         {Opt_target_fabric, "target_fabric=%s"},
1510         {Opt_target_node, "target_node=%s"},
1511         {Opt_tpgt, "tpgt=%d"},
1512         {Opt_port_rtpi, "port_rtpi=%d"},
1513         {Opt_target_lun, "target_lun=%lld"},
1514         {Opt_err, NULL}
1515 };
1516
1517 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1518                 const char *page, size_t count)
1519 {
1520         struct se_device *dev = pr_to_dev(item);
1521         unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1522         unsigned char *t_fabric = NULL, *t_port = NULL;
1523         char *orig, *ptr, *opts;
1524         substring_t args[MAX_OPT_ARGS];
1525         unsigned long long tmp_ll;
1526         u64 sa_res_key = 0;
1527         u64 mapped_lun = 0, target_lun = 0;
1528         int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1529         u16 tpgt = 0;
1530         u8 type = 0;
1531
1532         if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1533                 return count;
1534         if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1535                 return count;
1536
1537         if (dev->export_count) {
1538                 pr_debug("Unable to process APTPL metadata while"
1539                         " active fabric exports exist\n");
1540                 return -EINVAL;
1541         }
1542
1543         opts = kstrdup(page, GFP_KERNEL);
1544         if (!opts)
1545                 return -ENOMEM;
1546
1547         orig = opts;
1548         while ((ptr = strsep(&opts, ",\n")) != NULL) {
1549                 if (!*ptr)
1550                         continue;
1551
1552                 token = match_token(ptr, tokens, args);
1553                 switch (token) {
1554                 case Opt_initiator_fabric:
1555                         i_fabric = match_strdup(args);
1556                         if (!i_fabric) {
1557                                 ret = -ENOMEM;
1558                                 goto out;
1559                         }
1560                         break;
1561                 case Opt_initiator_node:
1562                         i_port = match_strdup(args);
1563                         if (!i_port) {
1564                                 ret = -ENOMEM;
1565                                 goto out;
1566                         }
1567                         if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1568                                 pr_err("APTPL metadata initiator_node="
1569                                         " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1570                                         PR_APTPL_MAX_IPORT_LEN);
1571                                 ret = -EINVAL;
1572                                 break;
1573                         }
1574                         break;
1575                 case Opt_initiator_sid:
1576                         isid = match_strdup(args);
1577                         if (!isid) {
1578                                 ret = -ENOMEM;
1579                                 goto out;
1580                         }
1581                         if (strlen(isid) >= PR_REG_ISID_LEN) {
1582                                 pr_err("APTPL metadata initiator_isid"
1583                                         "= exceeds PR_REG_ISID_LEN: %d\n",
1584                                         PR_REG_ISID_LEN);
1585                                 ret = -EINVAL;
1586                                 break;
1587                         }
1588                         break;
1589                 case Opt_sa_res_key:
1590                         ret = kstrtoull(args->from, 0, &tmp_ll);
1591                         if (ret < 0) {
1592                                 pr_err("kstrtoull() failed for sa_res_key=\n");
1593                                 goto out;
1594                         }
1595                         sa_res_key = (u64)tmp_ll;
1596                         break;
1597                 /*
1598                  * PR APTPL Metadata for Reservation
1599                  */
1600                 case Opt_res_holder:
1601                         ret = match_int(args, &arg);
1602                         if (ret)
1603                                 goto out;
1604                         res_holder = arg;
1605                         break;
1606                 case Opt_res_type:
1607                         ret = match_int(args, &arg);
1608                         if (ret)
1609                                 goto out;
1610                         type = (u8)arg;
1611                         break;
1612                 case Opt_res_scope:
1613                         ret = match_int(args, &arg);
1614                         if (ret)
1615                                 goto out;
1616                         break;
1617                 case Opt_res_all_tg_pt:
1618                         ret = match_int(args, &arg);
1619                         if (ret)
1620                                 goto out;
1621                         all_tg_pt = (int)arg;
1622                         break;
1623                 case Opt_mapped_lun:
1624                         ret = match_int(args, &arg);
1625                         if (ret)
1626                                 goto out;
1627                         mapped_lun = (u64)arg;
1628                         break;
1629                 /*
1630                  * PR APTPL Metadata for Target Port
1631                  */
1632                 case Opt_target_fabric:
1633                         t_fabric = match_strdup(args);
1634                         if (!t_fabric) {
1635                                 ret = -ENOMEM;
1636                                 goto out;
1637                         }
1638                         break;
1639                 case Opt_target_node:
1640                         t_port = match_strdup(args);
1641                         if (!t_port) {
1642                                 ret = -ENOMEM;
1643                                 goto out;
1644                         }
1645                         if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1646                                 pr_err("APTPL metadata target_node="
1647                                         " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1648                                         PR_APTPL_MAX_TPORT_LEN);
1649                                 ret = -EINVAL;
1650                                 break;
1651                         }
1652                         break;
1653                 case Opt_tpgt:
1654                         ret = match_int(args, &arg);
1655                         if (ret)
1656                                 goto out;
1657                         tpgt = (u16)arg;
1658                         break;
1659                 case Opt_port_rtpi:
1660                         ret = match_int(args, &arg);
1661                         if (ret)
1662                                 goto out;
1663                         break;
1664                 case Opt_target_lun:
1665                         ret = match_int(args, &arg);
1666                         if (ret)
1667                                 goto out;
1668                         target_lun = (u64)arg;
1669                         break;
1670                 default:
1671                         break;
1672                 }
1673         }
1674
1675         if (!i_port || !t_port || !sa_res_key) {
1676                 pr_err("Illegal parameters for APTPL registration\n");
1677                 ret = -EINVAL;
1678                 goto out;
1679         }
1680
1681         if (res_holder && !(type)) {
1682                 pr_err("Illegal PR type: 0x%02x for reservation"
1683                                 " holder\n", type);
1684                 ret = -EINVAL;
1685                 goto out;
1686         }
1687
1688         ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1689                         i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1690                         res_holder, all_tg_pt, type);
1691 out:
1692         kfree(i_fabric);
1693         kfree(i_port);
1694         kfree(isid);
1695         kfree(t_fabric);
1696         kfree(t_port);
1697         kfree(orig);
1698         return (ret == 0) ? count : ret;
1699 }
1700
1701
1702 CONFIGFS_ATTR_RO(target_pr_, res_holder);
1703 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
1704 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
1705 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
1706 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
1707 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
1708 CONFIGFS_ATTR_RO(target_pr_, res_type);
1709 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
1710 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
1711
1712 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1713         &target_pr_attr_res_holder,
1714         &target_pr_attr_res_pr_all_tgt_pts,
1715         &target_pr_attr_res_pr_generation,
1716         &target_pr_attr_res_pr_holder_tg_port,
1717         &target_pr_attr_res_pr_registered_i_pts,
1718         &target_pr_attr_res_pr_type,
1719         &target_pr_attr_res_type,
1720         &target_pr_attr_res_aptpl_active,
1721         &target_pr_attr_res_aptpl_metadata,
1722         NULL,
1723 };
1724
1725 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
1726
1727 /*  End functions for struct config_item_type tb_dev_pr_cit */
1728
1729 /*  Start functions for struct config_item_type tb_dev_cit */
1730
1731 static inline struct se_device *to_device(struct config_item *item)
1732 {
1733         return container_of(to_config_group(item), struct se_device, dev_group);
1734 }
1735
1736 static ssize_t target_dev_info_show(struct config_item *item, char *page)
1737 {
1738         struct se_device *dev = to_device(item);
1739         int bl = 0;
1740         ssize_t read_bytes = 0;
1741
1742         transport_dump_dev_state(dev, page, &bl);
1743         read_bytes += bl;
1744         read_bytes += dev->transport->show_configfs_dev_params(dev,
1745                         page+read_bytes);
1746         return read_bytes;
1747 }
1748
1749 static ssize_t target_dev_control_store(struct config_item *item,
1750                 const char *page, size_t count)
1751 {
1752         struct se_device *dev = to_device(item);
1753
1754         return dev->transport->set_configfs_dev_params(dev, page, count);
1755 }
1756
1757 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
1758 {
1759         struct se_device *dev = to_device(item);
1760
1761         if (!(dev->dev_flags & DF_USING_ALIAS))
1762                 return 0;
1763
1764         return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1765 }
1766
1767 static ssize_t target_dev_alias_store(struct config_item *item,
1768                 const char *page, size_t count)
1769 {
1770         struct se_device *dev = to_device(item);
1771         struct se_hba *hba = dev->se_hba;
1772         ssize_t read_bytes;
1773
1774         if (count > (SE_DEV_ALIAS_LEN-1)) {
1775                 pr_err("alias count: %d exceeds"
1776                         " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1777                         SE_DEV_ALIAS_LEN-1);
1778                 return -EINVAL;
1779         }
1780
1781         read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1782         if (!read_bytes)
1783                 return -EINVAL;
1784         if (dev->dev_alias[read_bytes - 1] == '\n')
1785                 dev->dev_alias[read_bytes - 1] = '\0';
1786
1787         dev->dev_flags |= DF_USING_ALIAS;
1788
1789         pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1790                 config_item_name(&hba->hba_group.cg_item),
1791                 config_item_name(&dev->dev_group.cg_item),
1792                 dev->dev_alias);
1793
1794         return read_bytes;
1795 }
1796
1797 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
1798 {
1799         struct se_device *dev = to_device(item);
1800
1801         if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1802                 return 0;
1803
1804         return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1805 }
1806
1807 static ssize_t target_dev_udev_path_store(struct config_item *item,
1808                 const char *page, size_t count)
1809 {
1810         struct se_device *dev = to_device(item);
1811         struct se_hba *hba = dev->se_hba;
1812         ssize_t read_bytes;
1813
1814         if (count > (SE_UDEV_PATH_LEN-1)) {
1815                 pr_err("udev_path count: %d exceeds"
1816                         " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1817                         SE_UDEV_PATH_LEN-1);
1818                 return -EINVAL;
1819         }
1820
1821         read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1822                         "%s", page);
1823         if (!read_bytes)
1824                 return -EINVAL;
1825         if (dev->udev_path[read_bytes - 1] == '\n')
1826                 dev->udev_path[read_bytes - 1] = '\0';
1827
1828         dev->dev_flags |= DF_USING_UDEV_PATH;
1829
1830         pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1831                 config_item_name(&hba->hba_group.cg_item),
1832                 config_item_name(&dev->dev_group.cg_item),
1833                 dev->udev_path);
1834
1835         return read_bytes;
1836 }
1837
1838 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
1839 {
1840         struct se_device *dev = to_device(item);
1841
1842         return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1843 }
1844
1845 static ssize_t target_dev_enable_store(struct config_item *item,
1846                 const char *page, size_t count)
1847 {
1848         struct se_device *dev = to_device(item);
1849         char *ptr;
1850         int ret;
1851
1852         ptr = strstr(page, "1");
1853         if (!ptr) {
1854                 pr_err("For dev_enable ops, only valid value"
1855                                 " is \"1\"\n");
1856                 return -EINVAL;
1857         }
1858
1859         ret = target_configure_device(dev);
1860         if (ret)
1861                 return ret;
1862         return count;
1863 }
1864
1865 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
1866 {
1867         struct se_device *dev = to_device(item);
1868         struct config_item *lu_ci;
1869         struct t10_alua_lu_gp *lu_gp;
1870         struct t10_alua_lu_gp_member *lu_gp_mem;
1871         ssize_t len = 0;
1872
1873         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1874         if (!lu_gp_mem)
1875                 return 0;
1876
1877         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1878         lu_gp = lu_gp_mem->lu_gp;
1879         if (lu_gp) {
1880                 lu_ci = &lu_gp->lu_gp_group.cg_item;
1881                 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1882                         config_item_name(lu_ci), lu_gp->lu_gp_id);
1883         }
1884         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1885
1886         return len;
1887 }
1888
1889 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
1890                 const char *page, size_t count)
1891 {
1892         struct se_device *dev = to_device(item);
1893         struct se_hba *hba = dev->se_hba;
1894         struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1895         struct t10_alua_lu_gp_member *lu_gp_mem;
1896         unsigned char buf[LU_GROUP_NAME_BUF];
1897         int move = 0;
1898
1899         lu_gp_mem = dev->dev_alua_lu_gp_mem;
1900         if (!lu_gp_mem)
1901                 return count;
1902
1903         if (count > LU_GROUP_NAME_BUF) {
1904                 pr_err("ALUA LU Group Alias too large!\n");
1905                 return -EINVAL;
1906         }
1907         memset(buf, 0, LU_GROUP_NAME_BUF);
1908         memcpy(buf, page, count);
1909         /*
1910          * Any ALUA logical unit alias besides "NULL" means we will be
1911          * making a new group association.
1912          */
1913         if (strcmp(strstrip(buf), "NULL")) {
1914                 /*
1915                  * core_alua_get_lu_gp_by_name() will increment reference to
1916                  * struct t10_alua_lu_gp.  This reference is released with
1917                  * core_alua_get_lu_gp_by_name below().
1918                  */
1919                 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1920                 if (!lu_gp_new)
1921                         return -ENODEV;
1922         }
1923
1924         spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1925         lu_gp = lu_gp_mem->lu_gp;
1926         if (lu_gp) {
1927                 /*
1928                  * Clearing an existing lu_gp association, and replacing
1929                  * with NULL
1930                  */
1931                 if (!lu_gp_new) {
1932                         pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1933                                 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1934                                 " %hu\n",
1935                                 config_item_name(&hba->hba_group.cg_item),
1936                                 config_item_name(&dev->dev_group.cg_item),
1937                                 config_item_name(&lu_gp->lu_gp_group.cg_item),
1938                                 lu_gp->lu_gp_id);
1939
1940                         __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1941                         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1942
1943                         return count;
1944                 }
1945                 /*
1946                  * Removing existing association of lu_gp_mem with lu_gp
1947                  */
1948                 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1949                 move = 1;
1950         }
1951         /*
1952          * Associate lu_gp_mem with lu_gp_new.
1953          */
1954         __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1955         spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1956
1957         pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1958                 " core/alua/lu_gps/%s, ID: %hu\n",
1959                 (move) ? "Moving" : "Adding",
1960                 config_item_name(&hba->hba_group.cg_item),
1961                 config_item_name(&dev->dev_group.cg_item),
1962                 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1963                 lu_gp_new->lu_gp_id);
1964
1965         core_alua_put_lu_gp_from_name(lu_gp_new);
1966         return count;
1967 }
1968
1969 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
1970 {
1971         struct se_device *dev = to_device(item);
1972         struct t10_alua_lba_map *map;
1973         struct t10_alua_lba_map_member *mem;
1974         char *b = page;
1975         int bl = 0;
1976         char state;
1977
1978         spin_lock(&dev->t10_alua.lba_map_lock);
1979         if (!list_empty(&dev->t10_alua.lba_map_list))
1980             bl += sprintf(b + bl, "%u %u\n",
1981                           dev->t10_alua.lba_map_segment_size,
1982                           dev->t10_alua.lba_map_segment_multiplier);
1983         list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1984                 bl += sprintf(b + bl, "%llu %llu",
1985                               map->lba_map_first_lba, map->lba_map_last_lba);
1986                 list_for_each_entry(mem, &map->lba_map_mem_list,
1987                                     lba_map_mem_list) {
1988                         switch (mem->lba_map_mem_alua_state) {
1989                         case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1990                                 state = 'O';
1991                                 break;
1992                         case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1993                                 state = 'A';
1994                                 break;
1995                         case ALUA_ACCESS_STATE_STANDBY:
1996                                 state = 'S';
1997                                 break;
1998                         case ALUA_ACCESS_STATE_UNAVAILABLE:
1999                                 state = 'U';
2000                                 break;
2001                         default:
2002                                 state = '.';
2003                                 break;
2004                         }
2005                         bl += sprintf(b + bl, " %d:%c",
2006                                       mem->lba_map_mem_alua_pg_id, state);
2007                 }
2008                 bl += sprintf(b + bl, "\n");
2009         }
2010         spin_unlock(&dev->t10_alua.lba_map_lock);
2011         return bl;
2012 }
2013
2014 static ssize_t target_dev_lba_map_store(struct config_item *item,
2015                 const char *page, size_t count)
2016 {
2017         struct se_device *dev = to_device(item);
2018         struct t10_alua_lba_map *lba_map = NULL;
2019         struct list_head lba_list;
2020         char *map_entries, *orig, *ptr;
2021         char state;
2022         int pg_num = -1, pg;
2023         int ret = 0, num = 0, pg_id, alua_state;
2024         unsigned long start_lba = -1, end_lba = -1;
2025         unsigned long segment_size = -1, segment_mult = -1;
2026
2027         orig = map_entries = kstrdup(page, GFP_KERNEL);
2028         if (!map_entries)
2029                 return -ENOMEM;
2030
2031         INIT_LIST_HEAD(&lba_list);
2032         while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2033                 if (!*ptr)
2034                         continue;
2035
2036                 if (num == 0) {
2037                         if (sscanf(ptr, "%lu %lu\n",
2038                                    &segment_size, &segment_mult) != 2) {
2039                                 pr_err("Invalid line %d\n", num);
2040                                 ret = -EINVAL;
2041                                 break;
2042                         }
2043                         num++;
2044                         continue;
2045                 }
2046                 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2047                         pr_err("Invalid line %d\n", num);
2048                         ret = -EINVAL;
2049                         break;
2050                 }
2051                 ptr = strchr(ptr, ' ');
2052                 if (!ptr) {
2053                         pr_err("Invalid line %d, missing end lba\n", num);
2054                         ret = -EINVAL;
2055                         break;
2056                 }
2057                 ptr++;
2058                 ptr = strchr(ptr, ' ');
2059                 if (!ptr) {
2060                         pr_err("Invalid line %d, missing state definitions\n",
2061                                num);
2062                         ret = -EINVAL;
2063                         break;
2064                 }
2065                 ptr++;
2066                 lba_map = core_alua_allocate_lba_map(&lba_list,
2067                                                      start_lba, end_lba);
2068                 if (IS_ERR(lba_map)) {
2069                         ret = PTR_ERR(lba_map);
2070                         break;
2071                 }
2072                 pg = 0;
2073                 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2074                         switch (state) {
2075                         case 'O':
2076                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2077                                 break;
2078                         case 'A':
2079                                 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2080                                 break;
2081                         case 'S':
2082                                 alua_state = ALUA_ACCESS_STATE_STANDBY;
2083                                 break;
2084                         case 'U':
2085                                 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2086                                 break;
2087                         default:
2088                                 pr_err("Invalid ALUA state '%c'\n", state);
2089                                 ret = -EINVAL;
2090                                 goto out;
2091                         }
2092
2093                         ret = core_alua_allocate_lba_map_mem(lba_map,
2094                                                              pg_id, alua_state);
2095                         if (ret) {
2096                                 pr_err("Invalid target descriptor %d:%c "
2097                                        "at line %d\n",
2098                                        pg_id, state, num);
2099                                 break;
2100                         }
2101                         pg++;
2102                         ptr = strchr(ptr, ' ');
2103                         if (ptr)
2104                                 ptr++;
2105                         else
2106                                 break;
2107                 }
2108                 if (pg_num == -1)
2109                     pg_num = pg;
2110                 else if (pg != pg_num) {
2111                         pr_err("Only %d from %d port groups definitions "
2112                                "at line %d\n", pg, pg_num, num);
2113                         ret = -EINVAL;
2114                         break;
2115                 }
2116                 num++;
2117         }
2118 out:
2119         if (ret) {
2120                 core_alua_free_lba_map(&lba_list);
2121                 count = ret;
2122         } else
2123                 core_alua_set_lba_map(dev, &lba_list,
2124                                       segment_size, segment_mult);
2125         kfree(orig);
2126         return count;
2127 }
2128
2129 CONFIGFS_ATTR_RO(target_dev_, info);
2130 CONFIGFS_ATTR_WO(target_dev_, control);
2131 CONFIGFS_ATTR(target_dev_, alias);
2132 CONFIGFS_ATTR(target_dev_, udev_path);
2133 CONFIGFS_ATTR(target_dev_, enable);
2134 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2135 CONFIGFS_ATTR(target_dev_, lba_map);
2136
2137 static struct configfs_attribute *target_core_dev_attrs[] = {
2138         &target_dev_attr_info,
2139         &target_dev_attr_control,
2140         &target_dev_attr_alias,
2141         &target_dev_attr_udev_path,
2142         &target_dev_attr_enable,
2143         &target_dev_attr_alua_lu_gp,
2144         &target_dev_attr_lba_map,
2145         NULL,
2146 };
2147
2148 static void target_core_dev_release(struct config_item *item)
2149 {
2150         struct config_group *dev_cg = to_config_group(item);
2151         struct se_device *dev =
2152                 container_of(dev_cg, struct se_device, dev_group);
2153
2154         kfree(dev_cg->default_groups);
2155         target_free_device(dev);
2156 }
2157
2158 static struct configfs_item_operations target_core_dev_item_ops = {
2159         .release                = target_core_dev_release,
2160 };
2161
2162 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2163
2164 /* End functions for struct config_item_type tb_dev_cit */
2165
2166 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2167
2168 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2169 {
2170         return container_of(to_config_group(item), struct t10_alua_lu_gp,
2171                         lu_gp_group);
2172 }
2173
2174 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2175 {
2176         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2177
2178         if (!lu_gp->lu_gp_valid_id)
2179                 return 0;
2180         return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2181 }
2182
2183 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2184                 const char *page, size_t count)
2185 {
2186         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2187         struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2188         unsigned long lu_gp_id;
2189         int ret;
2190
2191         ret = kstrtoul(page, 0, &lu_gp_id);
2192         if (ret < 0) {
2193                 pr_err("kstrtoul() returned %d for"
2194                         " lu_gp_id\n", ret);
2195                 return ret;
2196         }
2197         if (lu_gp_id > 0x0000ffff) {
2198                 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2199                         " 0x0000ffff\n", lu_gp_id);
2200                 return -EINVAL;
2201         }
2202
2203         ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2204         if (ret < 0)
2205                 return -EINVAL;
2206
2207         pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2208                 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2209                 config_item_name(&alua_lu_gp_cg->cg_item),
2210                 lu_gp->lu_gp_id);
2211
2212         return count;
2213 }
2214
2215 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2216 {
2217         struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2218         struct se_device *dev;
2219         struct se_hba *hba;
2220         struct t10_alua_lu_gp_member *lu_gp_mem;
2221         ssize_t len = 0, cur_len;
2222         unsigned char buf[LU_GROUP_NAME_BUF];
2223
2224         memset(buf, 0, LU_GROUP_NAME_BUF);
2225
2226         spin_lock(&lu_gp->lu_gp_lock);
2227         list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2228                 dev = lu_gp_mem->lu_gp_mem_dev;
2229                 hba = dev->se_hba;
2230
2231                 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2232                         config_item_name(&hba->hba_group.cg_item),
2233                         config_item_name(&dev->dev_group.cg_item));
2234                 cur_len++; /* Extra byte for NULL terminator */
2235
2236                 if ((cur_len + len) > PAGE_SIZE) {
2237                         pr_warn("Ran out of lu_gp_show_attr"
2238                                 "_members buffer\n");
2239                         break;
2240                 }
2241                 memcpy(page+len, buf, cur_len);
2242                 len += cur_len;
2243         }
2244         spin_unlock(&lu_gp->lu_gp_lock);
2245
2246         return len;
2247 }
2248
2249 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2250 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2251
2252 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2253         &target_lu_gp_attr_lu_gp_id,
2254         &target_lu_gp_attr_members,
2255         NULL,
2256 };
2257
2258 static void target_core_alua_lu_gp_release(struct config_item *item)
2259 {
2260         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2261                         struct t10_alua_lu_gp, lu_gp_group);
2262
2263         core_alua_free_lu_gp(lu_gp);
2264 }
2265
2266 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2267         .release                = target_core_alua_lu_gp_release,
2268 };
2269
2270 static struct config_item_type target_core_alua_lu_gp_cit = {
2271         .ct_item_ops            = &target_core_alua_lu_gp_ops,
2272         .ct_attrs               = target_core_alua_lu_gp_attrs,
2273         .ct_owner               = THIS_MODULE,
2274 };
2275
2276 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2277
2278 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2279
2280 static struct config_group *target_core_alua_create_lu_gp(
2281         struct config_group *group,
2282         const char *name)
2283 {
2284         struct t10_alua_lu_gp *lu_gp;
2285         struct config_group *alua_lu_gp_cg = NULL;
2286         struct config_item *alua_lu_gp_ci = NULL;
2287
2288         lu_gp = core_alua_allocate_lu_gp(name, 0);
2289         if (IS_ERR(lu_gp))
2290                 return NULL;
2291
2292         alua_lu_gp_cg = &lu_gp->lu_gp_group;
2293         alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2294
2295         config_group_init_type_name(alua_lu_gp_cg, name,
2296                         &target_core_alua_lu_gp_cit);
2297
2298         pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2299                 " Group: core/alua/lu_gps/%s\n",
2300                 config_item_name(alua_lu_gp_ci));
2301
2302         return alua_lu_gp_cg;
2303
2304 }
2305
2306 static void target_core_alua_drop_lu_gp(
2307         struct config_group *group,
2308         struct config_item *item)
2309 {
2310         struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2311                         struct t10_alua_lu_gp, lu_gp_group);
2312
2313         pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2314                 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2315                 config_item_name(item), lu_gp->lu_gp_id);
2316         /*
2317          * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2318          * -> target_core_alua_lu_gp_release()
2319          */
2320         config_item_put(item);
2321 }
2322
2323 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2324         .make_group             = &target_core_alua_create_lu_gp,
2325         .drop_item              = &target_core_alua_drop_lu_gp,
2326 };
2327
2328 static struct config_item_type target_core_alua_lu_gps_cit = {
2329         .ct_item_ops            = NULL,
2330         .ct_group_ops           = &target_core_alua_lu_gps_group_ops,
2331         .ct_owner               = THIS_MODULE,
2332 };
2333
2334 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2335
2336 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2337
2338 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2339 {
2340         return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2341                         tg_pt_gp_group);
2342 }
2343
2344 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2345                 char *page)
2346 {
2347         return sprintf(page, "%d\n",
2348                 atomic_read(&to_tg_pt_gp(item)->tg_pt_gp_alua_access_state));
2349 }
2350
2351 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2352                 const char *page, size_t count)
2353 {
2354         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2355         struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2356         unsigned long tmp;
2357         int new_state, ret;
2358
2359         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2360                 pr_err("Unable to do implicit ALUA on non valid"
2361                         " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2362                 return -EINVAL;
2363         }
2364         if (!(dev->dev_flags & DF_CONFIGURED)) {
2365                 pr_err("Unable to set alua_access_state while device is"
2366                        " not configured\n");
2367                 return -ENODEV;
2368         }
2369
2370         ret = kstrtoul(page, 0, &tmp);
2371         if (ret < 0) {
2372                 pr_err("Unable to extract new ALUA access state from"
2373                                 " %s\n", page);
2374                 return ret;
2375         }
2376         new_state = (int)tmp;
2377
2378         if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2379                 pr_err("Unable to process implicit configfs ALUA"
2380                         " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2381                 return -EINVAL;
2382         }
2383         if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2384             new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2385                 /* LBA DEPENDENT is only allowed with implicit ALUA */
2386                 pr_err("Unable to process implicit configfs ALUA transition"
2387                        " while explicit ALUA management is enabled\n");
2388                 return -EINVAL;
2389         }
2390
2391         ret = core_alua_do_port_transition(tg_pt_gp, dev,
2392                                         NULL, NULL, new_state, 0);
2393         return (!ret) ? count : -EINVAL;
2394 }
2395
2396 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2397                 char *page)
2398 {
2399         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2400         return sprintf(page, "%s\n",
2401                 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2402 }
2403
2404 static ssize_t target_tg_pt_gp_alua_access_status_store(
2405                 struct config_item *item, const char *page, size_t count)
2406 {
2407         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2408         unsigned long tmp;
2409         int new_status, ret;
2410
2411         if (!tg_pt_gp->tg_pt_gp_valid_id) {
2412                 pr_err("Unable to do set ALUA access status on non"
2413                         " valid tg_pt_gp ID: %hu\n",
2414                         tg_pt_gp->tg_pt_gp_valid_id);
2415                 return -EINVAL;
2416         }
2417
2418         ret = kstrtoul(page, 0, &tmp);
2419         if (ret < 0) {
2420                 pr_err("Unable to extract new ALUA access status"
2421                                 " from %s\n", page);
2422                 return ret;
2423         }
2424         new_status = (int)tmp;
2425
2426         if ((new_status != ALUA_STATUS_NONE) &&
2427             (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2428             (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2429                 pr_err("Illegal ALUA access status: 0x%02x\n",
2430                                 new_status);
2431                 return -EINVAL;
2432         }
2433
2434         tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2435         return count;
2436 }
2437
2438 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2439                 char *page)
2440 {
2441         return core_alua_show_access_type(to_tg_pt_gp(item), page);
2442 }
2443
2444 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2445                 const char *page, size_t count)
2446 {
2447         return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2448 }
2449
2450 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit)                          \
2451 static ssize_t target_tg_pt_gp_alua_support_##_name##_show(             \
2452                 struct config_item *item, char *p)                      \
2453 {                                                                       \
2454         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2455         return sprintf(p, "%d\n",                                       \
2456                 !!(t->tg_pt_gp_alua_supported_states & _bit));          \
2457 }                                                                       \
2458                                                                         \
2459 static ssize_t target_tg_pt_gp_alua_support_##_name##_store(            \
2460                 struct config_item *item, const char *p, size_t c)      \
2461 {                                                                       \
2462         struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item);                \
2463         unsigned long tmp;                                              \
2464         int ret;                                                        \
2465                                                                         \
2466         if (!t->tg_pt_gp_valid_id) {                                    \
2467                 pr_err("Unable to do set ##_name ALUA state on non"     \
2468                        " valid tg_pt_gp ID: %hu\n",                     \
2469                        t->tg_pt_gp_valid_id);                           \
2470                 return -EINVAL;                                         \
2471         }                                                               \
2472                                                                         \
2473         ret = kstrtoul(p, 0, &tmp);                                     \
2474         if (ret < 0) {                                                  \
2475                 pr_err("Invalid value '%s', must be '0' or '1'\n", p);  \
2476                 return -EINVAL;                                         \
2477         }                                                               \
2478         if (tmp > 1) {                                                  \
2479                 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2480                 return -EINVAL;                                         \
2481         }                                                               \
2482         if (tmp)                                                        \
2483                 t->tg_pt_gp_alua_supported_states |= _bit;              \
2484         else                                                            \
2485                 t->tg_pt_gp_alua_supported_states &= ~_bit;             \
2486                                                                         \
2487         return c;                                                       \
2488 }
2489
2490 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2491 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2492 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2493 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2494 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2495 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2496 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2497
2498 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2499                 struct config_item *item, char *page)
2500 {
2501         return sprintf(page, "%d\n",
2502                 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2503 }
2504
2505 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2506                 struct config_item *item, const char *page, size_t count)
2507 {
2508         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2509         unsigned long tmp;
2510         int ret;
2511
2512         ret = kstrtoul(page, 0, &tmp);
2513         if (ret < 0) {
2514                 pr_err("Unable to extract alua_write_metadata\n");
2515                 return ret;
2516         }
2517
2518         if ((tmp != 0) && (tmp != 1)) {
2519                 pr_err("Illegal value for alua_write_metadata:"
2520                         " %lu\n", tmp);
2521                 return -EINVAL;
2522         }
2523         tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2524
2525         return count;
2526 }
2527
2528 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2529                 char *page)
2530 {
2531         return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2532 }
2533
2534 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2535                 const char *page, size_t count)
2536 {
2537         return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2538                         count);
2539 }
2540
2541 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2542                 char *page)
2543 {
2544         return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2545 }
2546
2547 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2548                 const char *page, size_t count)
2549 {
2550         return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2551                         count);
2552 }
2553
2554 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2555                 struct config_item *item, char *page)
2556 {
2557         return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2558 }
2559
2560 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2561                 struct config_item *item, const char *page, size_t count)
2562 {
2563         return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2564                         count);
2565 }
2566
2567 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2568                 char *page)
2569 {
2570         return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2571 }
2572
2573 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2574                 const char *page, size_t count)
2575 {
2576         return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2577 }
2578
2579 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2580                 char *page)
2581 {
2582         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2583
2584         if (!tg_pt_gp->tg_pt_gp_valid_id)
2585                 return 0;
2586         return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2587 }
2588
2589 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2590                 const char *page, size_t count)
2591 {
2592         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2593         struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2594         unsigned long tg_pt_gp_id;
2595         int ret;
2596
2597         ret = kstrtoul(page, 0, &tg_pt_gp_id);
2598         if (ret < 0) {
2599                 pr_err("kstrtoul() returned %d for"
2600                         " tg_pt_gp_id\n", ret);
2601                 return ret;
2602         }
2603         if (tg_pt_gp_id > 0x0000ffff) {
2604                 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2605                         " 0x0000ffff\n", tg_pt_gp_id);
2606                 return -EINVAL;
2607         }
2608
2609         ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2610         if (ret < 0)
2611                 return -EINVAL;
2612
2613         pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2614                 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2615                 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2616                 tg_pt_gp->tg_pt_gp_id);
2617
2618         return count;
2619 }
2620
2621 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2622                 char *page)
2623 {
2624         struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2625         struct se_lun *lun;
2626         ssize_t len = 0, cur_len;
2627         unsigned char buf[TG_PT_GROUP_NAME_BUF];
2628
2629         memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2630
2631         spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2632         list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2633                         lun_tg_pt_gp_link) {
2634                 struct se_portal_group *tpg = lun->lun_tpg;
2635
2636                 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2637                         "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2638                         tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2639                         tpg->se_tpg_tfo->tpg_get_tag(tpg),
2640                         config_item_name(&lun->lun_group.cg_item));
2641                 cur_len++; /* Extra byte for NULL terminator */
2642
2643                 if ((cur_len + len) > PAGE_SIZE) {
2644                         pr_warn("Ran out of lu_gp_show_attr"
2645                                 "_members buffer\n");
2646                         break;
2647                 }
2648                 memcpy(page+len, buf, cur_len);
2649                 len += cur_len;
2650         }
2651         spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2652
2653         return len;
2654 }
2655
2656 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2657 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2658 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2659 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2660 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2661 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2662 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2663 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2664 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2665 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2666 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2667 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2668 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2669 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
2670 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
2671 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
2672 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
2673
2674 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2675         &target_tg_pt_gp_attr_alua_access_state,
2676         &target_tg_pt_gp_attr_alua_access_status,
2677         &target_tg_pt_gp_attr_alua_access_type,
2678         &target_tg_pt_gp_attr_alua_support_transitioning,
2679         &target_tg_pt_gp_attr_alua_support_offline,
2680         &target_tg_pt_gp_attr_alua_support_lba_dependent,
2681         &target_tg_pt_gp_attr_alua_support_unavailable,
2682         &target_tg_pt_gp_attr_alua_support_standby,
2683         &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
2684         &target_tg_pt_gp_attr_alua_support_active_optimized,
2685         &target_tg_pt_gp_attr_alua_write_metadata,
2686         &target_tg_pt_gp_attr_nonop_delay_msecs,
2687         &target_tg_pt_gp_attr_trans_delay_msecs,
2688         &target_tg_pt_gp_attr_implicit_trans_secs,
2689         &target_tg_pt_gp_attr_preferred,
2690         &target_tg_pt_gp_attr_tg_pt_gp_id,
2691         &target_tg_pt_gp_attr_members,
2692         NULL,
2693 };
2694
2695 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2696 {
2697         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2698                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2699
2700         core_alua_free_tg_pt_gp(tg_pt_gp);
2701 }
2702
2703 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2704         .release                = target_core_alua_tg_pt_gp_release,
2705 };
2706
2707 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2708         .ct_item_ops            = &target_core_alua_tg_pt_gp_ops,
2709         .ct_attrs               = target_core_alua_tg_pt_gp_attrs,
2710         .ct_owner               = THIS_MODULE,
2711 };
2712
2713 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2714
2715 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2716
2717 static struct config_group *target_core_alua_create_tg_pt_gp(
2718         struct config_group *group,
2719         const char *name)
2720 {
2721         struct t10_alua *alua = container_of(group, struct t10_alua,
2722                                         alua_tg_pt_gps_group);
2723         struct t10_alua_tg_pt_gp *tg_pt_gp;
2724         struct config_group *alua_tg_pt_gp_cg = NULL;
2725         struct config_item *alua_tg_pt_gp_ci = NULL;
2726
2727         tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2728         if (!tg_pt_gp)
2729                 return NULL;
2730
2731         alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2732         alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2733
2734         config_group_init_type_name(alua_tg_pt_gp_cg, name,
2735                         &target_core_alua_tg_pt_gp_cit);
2736
2737         pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2738                 " Group: alua/tg_pt_gps/%s\n",
2739                 config_item_name(alua_tg_pt_gp_ci));
2740
2741         return alua_tg_pt_gp_cg;
2742 }
2743
2744 static void target_core_alua_drop_tg_pt_gp(
2745         struct config_group *group,
2746         struct config_item *item)
2747 {
2748         struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2749                         struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2750
2751         pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2752                 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2753                 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2754         /*
2755          * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2756          * -> target_core_alua_tg_pt_gp_release().
2757          */
2758         config_item_put(item);
2759 }
2760
2761 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2762         .make_group             = &target_core_alua_create_tg_pt_gp,
2763         .drop_item              = &target_core_alua_drop_tg_pt_gp,
2764 };
2765
2766 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2767
2768 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2769
2770 /* Start functions for struct config_item_type target_core_alua_cit */
2771
2772 /*
2773  * target_core_alua_cit is a ConfigFS group that lives under
2774  * /sys/kernel/config/target/core/alua.  There are default groups
2775  * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2776  * target_core_alua_cit in target_core_init_configfs() below.
2777  */
2778 static struct config_item_type target_core_alua_cit = {
2779         .ct_item_ops            = NULL,
2780         .ct_attrs               = NULL,
2781         .ct_owner               = THIS_MODULE,
2782 };
2783
2784 /* End functions for struct config_item_type target_core_alua_cit */
2785
2786 /* Start functions for struct config_item_type tb_dev_stat_cit */
2787
2788 static struct config_group *target_core_stat_mkdir(
2789         struct config_group *group,
2790         const char *name)
2791 {
2792         return ERR_PTR(-ENOSYS);
2793 }
2794
2795 static void target_core_stat_rmdir(
2796         struct config_group *group,
2797         struct config_item *item)
2798 {
2799         return;
2800 }
2801
2802 static struct configfs_group_operations target_core_stat_group_ops = {
2803         .make_group             = &target_core_stat_mkdir,
2804         .drop_item              = &target_core_stat_rmdir,
2805 };
2806
2807 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2808
2809 /* End functions for struct config_item_type tb_dev_stat_cit */
2810
2811 /* Start functions for struct config_item_type target_core_hba_cit */
2812
2813 static struct config_group *target_core_make_subdev(
2814         struct config_group *group,
2815         const char *name)
2816 {
2817         struct t10_alua_tg_pt_gp *tg_pt_gp;
2818         struct config_item *hba_ci = &group->cg_item;
2819         struct se_hba *hba = item_to_hba(hba_ci);
2820         struct target_backend *tb = hba->backend;
2821         struct se_device *dev;
2822         struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2823         struct config_group *dev_stat_grp = NULL;
2824         int errno = -ENOMEM, ret;
2825
2826         ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2827         if (ret)
2828                 return ERR_PTR(ret);
2829
2830         dev = target_alloc_device(hba, name);
2831         if (!dev)
2832                 goto out_unlock;
2833
2834         dev_cg = &dev->dev_group;
2835
2836         dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2837                         GFP_KERNEL);
2838         if (!dev_cg->default_groups)
2839                 goto out_free_device;
2840
2841         config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit);
2842         config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2843                         &tb->tb_dev_attrib_cit);
2844         config_group_init_type_name(&dev->dev_pr_group, "pr",
2845                         &tb->tb_dev_pr_cit);
2846         config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2847                         &tb->tb_dev_wwn_cit);
2848         config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2849                         "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
2850         config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2851                         "statistics", &tb->tb_dev_stat_cit);
2852
2853         dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2854         dev_cg->default_groups[1] = &dev->dev_pr_group;
2855         dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2856         dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2857         dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2858         dev_cg->default_groups[5] = NULL;
2859         /*
2860          * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2861          */
2862         tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2863         if (!tg_pt_gp)
2864                 goto out_free_dev_cg_default_groups;
2865         dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2866
2867         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2868         tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2869                                 GFP_KERNEL);
2870         if (!tg_pt_gp_cg->default_groups) {
2871                 pr_err("Unable to allocate tg_pt_gp_cg->"
2872                                 "default_groups\n");
2873                 goto out_free_tg_pt_gp;
2874         }
2875
2876         config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2877                         "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2878         tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2879         tg_pt_gp_cg->default_groups[1] = NULL;
2880         /*
2881          * Add core/$HBA/$DEV/statistics/ default groups
2882          */
2883         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2884         dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2885                                 GFP_KERNEL);
2886         if (!dev_stat_grp->default_groups) {
2887                 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2888                 goto out_free_tg_pt_gp_cg_default_groups;
2889         }
2890         target_stat_setup_dev_default_groups(dev);
2891
2892         mutex_unlock(&hba->hba_access_mutex);
2893         return dev_cg;
2894
2895 out_free_tg_pt_gp_cg_default_groups:
2896         kfree(tg_pt_gp_cg->default_groups);
2897 out_free_tg_pt_gp:
2898         core_alua_free_tg_pt_gp(tg_pt_gp);
2899 out_free_dev_cg_default_groups:
2900         kfree(dev_cg->default_groups);
2901 out_free_device:
2902         target_free_device(dev);
2903 out_unlock:
2904         mutex_unlock(&hba->hba_access_mutex);
2905         return ERR_PTR(errno);
2906 }
2907
2908 static void target_core_drop_subdev(
2909         struct config_group *group,
2910         struct config_item *item)
2911 {
2912         struct config_group *dev_cg = to_config_group(item);
2913         struct se_device *dev =
2914                 container_of(dev_cg, struct se_device, dev_group);
2915         struct se_hba *hba;
2916         struct config_item *df_item;
2917         struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2918         int i;
2919
2920         hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2921
2922         mutex_lock(&hba->hba_access_mutex);
2923
2924         dev_stat_grp = &dev->dev_stat_grps.stat_group;
2925         for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2926                 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2927                 dev_stat_grp->default_groups[i] = NULL;
2928                 config_item_put(df_item);
2929         }
2930         kfree(dev_stat_grp->default_groups);
2931
2932         tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2933         for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2934                 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2935                 tg_pt_gp_cg->default_groups[i] = NULL;
2936                 config_item_put(df_item);
2937         }
2938         kfree(tg_pt_gp_cg->default_groups);
2939         /*
2940          * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2941          * directly from target_core_alua_tg_pt_gp_release().
2942          */
2943         dev->t10_alua.default_tg_pt_gp = NULL;
2944
2945         for (i = 0; dev_cg->default_groups[i]; i++) {
2946                 df_item = &dev_cg->default_groups[i]->cg_item;
2947                 dev_cg->default_groups[i] = NULL;
2948                 config_item_put(df_item);
2949         }
2950         /*
2951          * se_dev is released from target_core_dev_item_ops->release()
2952          */
2953         config_item_put(item);
2954         mutex_unlock(&hba->hba_access_mutex);
2955 }
2956
2957 static struct configfs_group_operations target_core_hba_group_ops = {
2958         .make_group             = target_core_make_subdev,
2959         .drop_item              = target_core_drop_subdev,
2960 };
2961
2962
2963 static inline struct se_hba *to_hba(struct config_item *item)
2964 {
2965         return container_of(to_config_group(item), struct se_hba, hba_group);
2966 }
2967
2968 static ssize_t target_hba_info_show(struct config_item *item, char *page)
2969 {
2970         struct se_hba *hba = to_hba(item);
2971
2972         return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2973                         hba->hba_id, hba->backend->ops->name,
2974                         TARGET_CORE_VERSION);
2975 }
2976
2977 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
2978 {
2979         struct se_hba *hba = to_hba(item);
2980         int hba_mode = 0;
2981
2982         if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2983                 hba_mode = 1;
2984
2985         return sprintf(page, "%d\n", hba_mode);
2986 }
2987
2988 static ssize_t target_hba_mode_store(struct config_item *item,
2989                 const char *page, size_t count)
2990 {
2991         struct se_hba *hba = to_hba(item);
2992         unsigned long mode_flag;
2993         int ret;
2994
2995         if (hba->backend->ops->pmode_enable_hba == NULL)
2996                 return -EINVAL;
2997
2998         ret = kstrtoul(page, 0, &mode_flag);
2999         if (ret < 0) {
3000                 pr_err("Unable to extract hba mode flag: %d\n", ret);
3001                 return ret;
3002         }
3003
3004         if (hba->dev_count) {
3005                 pr_err("Unable to set hba_mode with active devices\n");
3006                 return -EINVAL;
3007         }
3008
3009         ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3010         if (ret < 0)
3011                 return -EINVAL;
3012         if (ret > 0)
3013                 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3014         else if (ret == 0)
3015                 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3016
3017         return count;
3018 }
3019
3020 CONFIGFS_ATTR_RO(target_, hba_info);
3021 CONFIGFS_ATTR(target_, hba_mode);
3022
3023 static void target_core_hba_release(struct config_item *item)
3024 {
3025         struct se_hba *hba = container_of(to_config_group(item),
3026                                 struct se_hba, hba_group);
3027         core_delete_hba(hba);
3028 }
3029
3030 static struct configfs_attribute *target_core_hba_attrs[] = {
3031         &target_attr_hba_info,
3032         &target_attr_hba_mode,
3033         NULL,
3034 };
3035
3036 static struct configfs_item_operations target_core_hba_item_ops = {
3037         .release                = target_core_hba_release,
3038 };
3039
3040 static struct config_item_type target_core_hba_cit = {
3041         .ct_item_ops            = &target_core_hba_item_ops,
3042         .ct_group_ops           = &target_core_hba_group_ops,
3043         .ct_attrs               = target_core_hba_attrs,
3044         .ct_owner               = THIS_MODULE,
3045 };
3046
3047 static struct config_group *target_core_call_addhbatotarget(
3048         struct config_group *group,
3049         const char *name)
3050 {
3051         char *se_plugin_str, *str, *str2;
3052         struct se_hba *hba;
3053         char buf[TARGET_CORE_NAME_MAX_LEN];
3054         unsigned long plugin_dep_id = 0;
3055         int ret;
3056
3057         memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3058         if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3059                 pr_err("Passed *name strlen(): %d exceeds"
3060                         " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3061                         TARGET_CORE_NAME_MAX_LEN);
3062                 return ERR_PTR(-ENAMETOOLONG);
3063         }
3064         snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3065
3066         str = strstr(buf, "_");
3067         if (!str) {
3068                 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3069                 return ERR_PTR(-EINVAL);
3070         }
3071         se_plugin_str = buf;
3072         /*
3073          * Special case for subsystem plugins that have "_" in their names.
3074          * Namely rd_direct and rd_mcp..
3075          */
3076         str2 = strstr(str+1, "_");
3077         if (str2) {
3078                 *str2 = '\0'; /* Terminate for *se_plugin_str */
3079                 str2++; /* Skip to start of plugin dependent ID */
3080                 str = str2;
3081         } else {
3082                 *str = '\0'; /* Terminate for *se_plugin_str */
3083                 str++; /* Skip to start of plugin dependent ID */
3084         }
3085
3086         ret = kstrtoul(str, 0, &plugin_dep_id);
3087         if (ret < 0) {
3088                 pr_err("kstrtoul() returned %d for"
3089                                 " plugin_dep_id\n", ret);
3090                 return ERR_PTR(ret);
3091         }
3092         /*
3093          * Load up TCM subsystem plugins if they have not already been loaded.
3094          */
3095         transport_subsystem_check_init();
3096
3097         hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3098         if (IS_ERR(hba))
3099                 return ERR_CAST(hba);
3100
3101         config_group_init_type_name(&hba->hba_group, name,
3102                         &target_core_hba_cit);
3103
3104         return &hba->hba_group;
3105 }
3106
3107 static void target_core_call_delhbafromtarget(
3108         struct config_group *group,
3109         struct config_item *item)
3110 {
3111         /*
3112          * core_delete_hba() is called from target_core_hba_item_ops->release()
3113          * -> target_core_hba_release()
3114          */
3115         config_item_put(item);
3116 }
3117
3118 static struct configfs_group_operations target_core_group_ops = {
3119         .make_group     = target_core_call_addhbatotarget,
3120         .drop_item      = target_core_call_delhbafromtarget,
3121 };
3122
3123 static struct config_item_type target_core_cit = {
3124         .ct_item_ops    = NULL,
3125         .ct_group_ops   = &target_core_group_ops,
3126         .ct_attrs       = NULL,
3127         .ct_owner       = THIS_MODULE,
3128 };
3129
3130 /* Stop functions for struct config_item_type target_core_hba_cit */
3131
3132 void target_setup_backend_cits(struct target_backend *tb)
3133 {
3134         target_core_setup_dev_cit(tb);
3135         target_core_setup_dev_attrib_cit(tb);
3136         target_core_setup_dev_pr_cit(tb);
3137         target_core_setup_dev_wwn_cit(tb);
3138         target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3139         target_core_setup_dev_stat_cit(tb);
3140 }
3141
3142 static int __init target_core_init_configfs(void)
3143 {
3144         struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3145         struct config_group *lu_gp_cg = NULL;
3146         struct configfs_subsystem *subsys = &target_core_fabrics;
3147         struct t10_alua_lu_gp *lu_gp;
3148         int ret;
3149
3150         pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3151                 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3152                 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3153
3154         config_group_init(&subsys->su_group);
3155         mutex_init(&subsys->su_mutex);
3156
3157         ret = init_se_kmem_caches();
3158         if (ret < 0)
3159                 return ret;
3160         /*
3161          * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3162          * and ALUA Logical Unit Group and Target Port Group infrastructure.
3163          */
3164         target_cg = &subsys->su_group;
3165         target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3166                                 GFP_KERNEL);
3167         if (!target_cg->default_groups) {
3168                 pr_err("Unable to allocate target_cg->default_groups\n");
3169                 ret = -ENOMEM;
3170                 goto out_global;
3171         }
3172
3173         config_group_init_type_name(&target_core_hbagroup,
3174                         "core", &target_core_cit);
3175         target_cg->default_groups[0] = &target_core_hbagroup;
3176         target_cg->default_groups[1] = NULL;
3177         /*
3178          * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3179          */
3180         hba_cg = &target_core_hbagroup;
3181         hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3182                                 GFP_KERNEL);
3183         if (!hba_cg->default_groups) {
3184                 pr_err("Unable to allocate hba_cg->default_groups\n");
3185                 ret = -ENOMEM;
3186                 goto out_global;
3187         }
3188         config_group_init_type_name(&alua_group,
3189                         "alua", &target_core_alua_cit);
3190         hba_cg->default_groups[0] = &alua_group;
3191         hba_cg->default_groups[1] = NULL;
3192         /*
3193          * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3194          * groups under /sys/kernel/config/target/core/alua/
3195          */
3196         alua_cg = &alua_group;
3197         alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3198                         GFP_KERNEL);
3199         if (!alua_cg->default_groups) {
3200                 pr_err("Unable to allocate alua_cg->default_groups\n");
3201                 ret = -ENOMEM;
3202                 goto out_global;
3203         }
3204
3205         config_group_init_type_name(&alua_lu_gps_group,
3206                         "lu_gps", &target_core_alua_lu_gps_cit);
3207         alua_cg->default_groups[0] = &alua_lu_gps_group;
3208         alua_cg->default_groups[1] = NULL;
3209         /*
3210          * Add core/alua/lu_gps/default_lu_gp
3211          */
3212         lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3213         if (IS_ERR(lu_gp)) {
3214                 ret = -ENOMEM;
3215                 goto out_global;
3216         }
3217
3218         lu_gp_cg = &alua_lu_gps_group;
3219         lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3220                         GFP_KERNEL);
3221         if (!lu_gp_cg->default_groups) {
3222                 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3223                 ret = -ENOMEM;
3224                 goto out_global;
3225         }
3226
3227         config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3228                                 &target_core_alua_lu_gp_cit);
3229         lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3230         lu_gp_cg->default_groups[1] = NULL;
3231         default_lu_gp = lu_gp;
3232         /*
3233          * Register the target_core_mod subsystem with configfs.
3234          */
3235         ret = configfs_register_subsystem(subsys);
3236         if (ret < 0) {
3237                 pr_err("Error %d while registering subsystem %s\n",
3238                         ret, subsys->su_group.cg_item.ci_namebuf);
3239                 goto out_global;
3240         }
3241         pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3242                 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3243                 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3244         /*
3245          * Register built-in RAMDISK subsystem logic for virtual LUN 0
3246          */
3247         ret = rd_module_init();
3248         if (ret < 0)
3249                 goto out;
3250
3251         ret = core_dev_setup_virtual_lun0();
3252         if (ret < 0)
3253                 goto out;
3254
3255         ret = target_xcopy_setup_pt();
3256         if (ret < 0)
3257                 goto out;
3258
3259         return 0;
3260
3261 out:
3262         configfs_unregister_subsystem(subsys);
3263         core_dev_release_virtual_lun0();
3264         rd_module_exit();
3265 out_global:
3266         if (default_lu_gp) {
3267                 core_alua_free_lu_gp(default_lu_gp);
3268                 default_lu_gp = NULL;
3269         }
3270         if (lu_gp_cg)
3271                 kfree(lu_gp_cg->default_groups);
3272         if (alua_cg)
3273                 kfree(alua_cg->default_groups);
3274         if (hba_cg)
3275                 kfree(hba_cg->default_groups);
3276         kfree(target_cg->default_groups);
3277         release_se_kmem_caches();
3278         return ret;
3279 }
3280
3281 static void __exit target_core_exit_configfs(void)
3282 {
3283         struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3284         struct config_item *item;
3285         int i;
3286
3287         lu_gp_cg = &alua_lu_gps_group;
3288         for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3289                 item = &lu_gp_cg->default_groups[i]->cg_item;
3290                 lu_gp_cg->default_groups[i] = NULL;
3291                 config_item_put(item);
3292         }
3293         kfree(lu_gp_cg->default_groups);
3294         lu_gp_cg->default_groups = NULL;
3295
3296         alua_cg = &alua_group;
3297         for (i = 0; alua_cg->default_groups[i]; i++) {
3298                 item = &alua_cg->default_groups[i]->cg_item;
3299                 alua_cg->default_groups[i] = NULL;
3300                 config_item_put(item);
3301         }
3302         kfree(alua_cg->default_groups);
3303         alua_cg->default_groups = NULL;
3304
3305         hba_cg = &target_core_hbagroup;
3306         for (i = 0; hba_cg->default_groups[i]; i++) {
3307                 item = &hba_cg->default_groups[i]->cg_item;
3308                 hba_cg->default_groups[i] = NULL;
3309                 config_item_put(item);
3310         }
3311         kfree(hba_cg->default_groups);
3312         hba_cg->default_groups = NULL;
3313         /*
3314          * We expect subsys->su_group.default_groups to be released
3315          * by configfs subsystem provider logic..
3316          */
3317         configfs_unregister_subsystem(&target_core_fabrics);
3318         kfree(target_core_fabrics.su_group.default_groups);
3319
3320         core_alua_free_lu_gp(default_lu_gp);
3321         default_lu_gp = NULL;
3322
3323         pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3324                         " Infrastructure\n");
3325
3326         core_dev_release_virtual_lun0();
3327         rd_module_exit();
3328         target_xcopy_release_pt();
3329         release_se_kmem_caches();
3330 }
3331
3332 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3333 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3334 MODULE_LICENSE("GPL");
3335
3336 module_init(target_core_init_configfs);
3337 module_exit(target_core_exit_configfs);